{
    "experiment_id":{
        "1pctCO2":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: 1pctCO2",
            "end_year":"",
            "experiment":"1 percent per year increase in CO2",
            "experiment_id":"1pctCO2",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "1pctCO2-4xext":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"branched from 1pctCO2 run at year 140 and run with CO2 fixed at 4x pre-industrial concentration",
            "end_year":"",
            "experiment":"extension from year 140 of 1pctCO2 with 4xCO2",
            "experiment_id":"1pctCO2-4xext",
            "min_number_yrs_per_sim":"210",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "1pctCO2"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "1pctCO2-bgc":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Biogeochemically-coupled specified concentration simulation in which CO2 increases at a rate of 1% per year until quadrupling",
            "end_year":"",
            "experiment":"biogeochemically-coupled version of 1 percent per year increasing CO2 experiment",
            "experiment_id":"1pctCO2-bgc",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "1pctCO2-cdr":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"1 percent per year decrease in CO2 (immediately after reaching 4xCO2 in the 1pctCO2 simulation); then held constant at pre-industrial level (part of the CDR-reversibility experiment)",
            "end_year":"",
            "experiment":"1 percent per year decrease in CO2 from 4xCO2",
            "experiment_id":"1pctCO2-cdr",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "1pctCO2"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "1pctCO2-rad":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Radiatively-coupled specified concentration simulation in which CO2 increases at a rate of 1% per year until quadrupling",
            "end_year":"",
            "experiment":"radiatively-coupled version of 1 percent per year increasing CO2 experiment",
            "experiment_id":"1pctCO2-rad",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "1pctCO2Ndep":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Fully-coupled specified concentration simulation in which CO2 increases at a rate of 1% per year until quadrupling, plus an additional scenario of anthropogenic nitrogen deposition",
            "end_year":"",
            "experiment":"1 percent per year increasing CO2 experiment with increasing N-deposition",
            "experiment_id":"1pctCO2Ndep",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "1pctCO2Ndep-bgc":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Biogeochemically-coupled specified concentration simulation in which CO2 increases at a rate of 1% per year until quadrupling, plus an additional scenario of anthropogenic nitrogen deposition",
            "end_year":"",
            "experiment":"biogeochemically-coupled version of 1 percent per year increasing CO2 experiment with increasing N-deposition",
            "experiment_id":"1pctCO2Ndep-bgc",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "1pctCO2to4x-withism":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Idealized 1%/yr CO2 increase to 4xC02 over 140yrs and kept constant at 4xCO2 for an additional 200 to 400 yrs simulation that includes interactive ice sheets",
            "end_year":"",
            "experiment":"simulation with interactive ice sheet forced by 1 percent per year increase in CO2 to 4xCO2 (subsequently held fixed)",
            "experiment_id":"1pctCO2to4x-withism",
            "min_number_yrs_per_sim":"350",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "piControl-withism"
            ],
            "required_model_components":[
                "AOGCM",
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "G1":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Beginning from a preindustrial control run, simultaneously quadruple the CO2 concentration and reduce the solar constant such that the TOA radiative flux remains within +/m0.1 W/m2",
            "end_year":"",
            "experiment":"abrupt quadrupling of CO2 plus reduction in total solar irradiance",
            "experiment_id":"G1",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "G6SST1":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 2020 (ScenarioMIP Tier 1 high forcing scenario)",
            "end_year":"",
            "experiment":"SSTs, forcings, and other prescribed conditions from year 2020 of SSP5-8.5",
            "experiment_id":"G6SST1",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "G6SST2-solar":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 2100 (G6solar)",
            "end_year":"",
            "experiment":"SSTs from year 2020 of SSP5-8.5; forcings and other prescribed conditions from year 2100 of G6solar",
            "experiment_id":"G6SST2-solar",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "GeoMIP"
            ],
            "parent_experiment_id":[
                "G6solar"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "G6SST2-sulfur":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 2100 (G6sulfur)",
            "end_year":"",
            "experiment":"SSTs from year 2020 of SSP5-8.5; forcings and other prescribed conditions from year 2100 of G6sulfur",
            "experiment_id":"G6SST2-sulfur",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "GeoMIP"
            ],
            "parent_experiment_id":[
                "G6sulfur"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "G6solar":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Using solar irradiance reduction, return the radiative forcing from a background of the ScenarioMIP high forcing to the ScenarioMIP middle forcing",
            "end_year":"2100",
            "experiment":"total solar irradiance reduction to reduce net forcing from SSP585 to SSP245",
            "experiment_id":"G6solar",
            "min_number_yrs_per_sim":"81",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "G6sulfur":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Using equatorial SO2 injection, return the radiative forcing from a background of the ScenarioMIP high forcing to the ScenarioMIP middle forcing",
            "end_year":"2100",
            "experiment":"stratospheric sulfate aerosol injection to reduce net forcing from SSP585 to SSP245",
            "experiment_id":"G6sulfur",
            "min_number_yrs_per_sim":"81",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "G7SST1-cirrus":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 2020 (ScenarioMIP Tier 1 high forcing scenario and cirrus thinning according to G7cirrus)",
            "end_year":"",
            "experiment":"SSTs from year 2020 of SSP5-8.5; forcings and other prescribed conditions from year 2020 of SSP5-8.5 and cirrus thinning",
            "experiment_id":"G7SST1-cirrus",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "G7SST2-cirrus":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 2100 (ScenarioMIP Tier 1 high forcing scenario and cirrus thinning according to G7cirrus)",
            "end_year":"",
            "experiment":"SSTs from year 2100 of SSP5-8.5; forcings and other prescribed conditions from year 2100 of G7cirrus",
            "experiment_id":"G7SST2-cirrus",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "GeoMIP"
            ],
            "parent_experiment_id":[
                "G7cirrus"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "G7cirrus":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Against a background of the ScenarioMIP high forcing, reduce cirrus cloud optical depth by a constant amount",
            "end_year":"2100",
            "experiment":"increase cirrus ice crystal fall speed to reduce net forcing in SSP585 by 1 W m-2",
            "experiment_id":"G7cirrus",
            "min_number_yrs_per_sim":"81",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "a4SST":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As piSST, but with monthly-varying SSTs taken from years 111-140 of each model's own abrupt-4xCO2 experiment instead of from piControl. Sea-ice is unchanged from piSST",
            "end_year":"",
            "experiment":"as piSST but with SSTs from abrupt-4xCO2",
            "experiment_id":"a4SST",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "a4SSTice":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As piSST, but with monthly-varying SSTs and sea-ice taken from years 111-140 of each model's own abrupt-4xCO2 experiment instead of from piControl",
            "end_year":"",
            "experiment":"as piSST but with SSTs and sea ice from abrupt-4xCO2",
            "experiment_id":"a4SSTice",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "a4SSTice-4xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As a4SSTice, but CO2 is quadrupled, and the increase in CO2 is seen by both the radiation scheme and vegetation",
            "end_year":"",
            "experiment":"as piSST but with SSTs and sea ice from abrupt-4xCO2, and 4xCO2 seen by radiation and vegetation",
            "experiment_id":"a4SSTice-4xCO2",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "abrupt-0p5xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Identical to the DECK abrupt-4xCO2, but at 0.5xCO2",
            "end_year":"",
            "experiment":"abrupt halving of CO2",
            "experiment_id":"abrupt-0p5xCO2",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "abrupt-2xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Identical to the DECK abrupt-4xCO2, but at 2xCO2",
            "end_year":"",
            "experiment":"abrupt doubling of CO2",
            "experiment_id":"abrupt-2xCO2",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "abrupt-4xCO2":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: abrupt-4xCO2",
            "end_year":"",
            "experiment":"abrupt quadrupling of CO2",
            "experiment_id":"abrupt-4xCO2",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "abrupt-solm4p":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Conceptually similar to abrupt 4xCO2 DECK experiment, except that the solar constant rather than CO2 is abruptly reduced by 4%",
            "end_year":"",
            "experiment":"abrupt 4% decrease in solar constant",
            "experiment_id":"abrupt-solm4p",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "abrupt-solp4p":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Conceptually similar to abrupt 4xCO2 DECK experiment, except that the solar constant rather than CO2 is abruptly increased by 4%",
            "end_year":"",
            "experiment":"abrupt 4% increase in solar constant",
            "experiment_id":"abrupt-solp4p",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: AMIP",
            "end_year":"2014",
            "experiment":"AMIP",
            "experiment_id":"amip",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "amip-4xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As CMIP5/CFMIP-2 amip4xCO2 experiment. AMIP experiment where SSTs are held at control values and the CO2 seen by the radiation scheme is quadrupled",
            "end_year":"2014",
            "experiment":"AMIP SSTs with 4xCO2",
            "experiment_id":"amip-4xCO2",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "amip-TIP":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"The topography of the TIP is modified by setting surface elevations to 500m; to understand the combined thermal and mechanical forcing of the TIP. Same model as DECK",
            "end_year":"2014",
            "experiment":"same as \"amip\" run, but surface elevations of the Tibetan-Iranian Plateau and Himalayas reduced to 500m",
            "experiment_id":"amip-TIP",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "amip-TIP-nosh":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Surface sensible heat released at the elevation above 500m over the TIP is not allowed to heat the atmosphere. Same model as DECK",
            "end_year":"2014",
            "experiment":"same as \"amip\" run, but sensible heat not allowed for elevations of the Tibetan-Iranian Plateau and Himalayas above 500m",
            "experiment_id":"amip-TIP-nosh",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "amip-a4SST-4xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Same as amip, but a patterned SST anomaly is applied on top of the monthly-varying amip SSTs. This anomaly is a monthly climatology, taken from each model's own abrupt-4xCO2 run minus piControl (using the mean of years 111-140 of abrupt-4xCO2, and the parallel 30-year section of piControl). CO2 is quadrupled, and the increase in CO2 is seen by both the radiation scheme and vegetation",
            "end_year":"2014",
            "experiment":"as AMIP but with warming pattern from abrupt-4xCO2 added to SSTs and 4xCO2 seen by radiation and vegetation",
            "experiment_id":"amip-a4SST-4xCO2",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-climSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA5.2: investigate role of transient SST in recent climate change",
            "end_year":"2014",
            "experiment":"AMIP with climatological SIC",
            "experiment_id":"amip-climSIC",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "amip-climSST":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA5.1: investigate role of transient sea ice in recent climate change",
            "end_year":"2014",
            "experiment":"AMIP with climatological SST",
            "experiment_id":"amip-climSST",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "amip-future4K":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As CMIP5/CFMIP-2 amipFuture experiment. AMIP experiment where SSTs are subject to a composite SST warming pattern derived from coupled models, scaled to an ice-free ocean mean of 4K",
            "end_year":"2014",
            "experiment":"AMIP with patterned 4K SST increase",
            "experiment_id":"amip-future4K",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "amip-hist":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Extended AMIP run that covers 1870-2014. All natural and anthropogenic historical forcings as used in CMIP6 Historical Simulation will be included. AGCM resolution as CMIP6 Historical Simulation. The HadISST data will be used",
            "end_year":"2014",
            "experiment":"AMIP-style simulation covering the period 1870-2014",
            "experiment_id":"amip-hist",
            "min_number_yrs_per_sim":"145",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1870",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "amip-hld":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"The topography of the highlands in Africa, N. America and S. America TP is modified by setting surface elevations to a certain height (500m). Same model as DECK",
            "end_year":"2014",
            "experiment":"same as \"amip\" run, but surface elevations of the East African Highlands in Africa, Sierra Madre in N. America and Andes in S. America reduced to 500m",
            "experiment_id":"amip-hld",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "amip-lfmip-pObs":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Land-hist land conditions; AMIP SSTs",
            "end_year":"2014",
            "experiment":"prescribed land (from pseudo-observations) and AMIP SSTs",
            "experiment_id":"amip-lfmip-pObs",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-lfmip-pdLC":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Scenario forced experiment with prescribed land surface climatology derived from modern conditions from the first historical ensemble member (1980-2014). SST and sea-ice from the first ensemble members of the historical and ssp585 experiments",
            "end_year":"2014",
            "experiment":"prescribed modern land surface climatology from historical, prescribed SST and sea-ice from historical plus scenario runs",
            "experiment_id":"amip-lfmip-pdLC",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-lfmip-rmLC":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Scenario forced experiment with prescribed land surface climatology derived from 30yr running mean from the first ensemble members of the historical and ssp585 experiments. SST and sea-ice from the first ensemble members of the historical and ssp585 experiments",
            "end_year":"2014",
            "experiment":"prescribed land surface climatology from historical plus scenario 30yr running mean, prescribed SST and sea-ice from historical plus scenario runs",
            "experiment_id":"amip-lfmip-rmLC",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-lwoff":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As amip experiment, but with cloud-radiative effects switched off in the LW radiation code",
            "end_year":"2014",
            "experiment":"AMIP experiment with longwave cloud-radiative effects off",
            "experiment_id":"amip-lwoff",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-m4K":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As amip experiment but SSTs are subject to a uniform cooling of 4K",
            "end_year":"2014",
            "experiment":"AMIP with uniform 4K SST decrease",
            "experiment_id":"amip-m4K",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-p4K":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As CMIP5/CFMIP-2 amip4K experiment. AMIP experiment where SSTs are subject to a uniform warming of 4K",
            "end_year":"2014",
            "experiment":"AMIP with uniform 4K SST increase",
            "experiment_id":"amip-p4K",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "amip-p4K-lwoff":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As amip-p4K experiment, but with cloud-radiative effects switched off in the LW radiation code",
            "end_year":"2014",
            "experiment":"AMIP experiment with uniform 4K SST increase and with longwave cloud radiative effects off",
            "experiment_id":"amip-p4K-lwoff",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "amip-piForcing":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Identical to standard AMIP experiment but from 1870-present with constant pre-industrial forcing levels (anthropogenic and natural)",
            "end_year":"2014",
            "experiment":"AMIP SSTs with pre-industrial anthropogenic and natural forcing",
            "experiment_id":"amip-piForcing",
            "min_number_yrs_per_sim":"145",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1870",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "aqua-4xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Extended version of CMIP5/CFMIP-2 aqua4xCO2 experiment. Aquaplanet experiment where SSTs are held at control values and the CO2 seen by the radiation scheme is quadrupled",
            "end_year":"",
            "experiment":"aquaplanet with control SST and 4xCO2",
            "experiment_id":"aqua-4xCO2",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "aqua-control":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Extended version of CMIP5/CFMIP-2 aquaControl experiment. Aquaplanet (no land) experiment with no seasonal cycle forced with specified zonally symmetric SSTs",
            "end_year":"",
            "experiment":"aquaplanet control",
            "experiment_id":"aqua-control",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "aqua-control-lwoff":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As aqua-control experiment, but with cloud-radiative effects switched off in the LW radiation code",
            "end_year":"",
            "experiment":"aquaplanet control with longwave cloud radiative effects off",
            "experiment_id":"aqua-control-lwoff",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "aqua-p4K":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Extended version of CMIP5/CFMIP-2 aqua4K experiment. Aquaplanet experiment where SSTs are subject to a uniform warming of 4K",
            "end_year":"",
            "experiment":"aquaplanet with uniform 4K SST increase",
            "experiment_id":"aqua-p4K",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "aqua-p4K-lwoff":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As aqua-p4K experiment, but with cloud-radiative effects switched off in the LW radiation code",
            "end_year":"",
            "experiment":"aquaplanet with uniform 4K SST increase and with longwave cloud radiative effects off",
            "experiment_id":"aqua-p4K-lwoff",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "control-1950":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Coupled integrations with constant 1950\"s forcing",
            "end_year":"",
            "experiment":"coupled control with fixed 1950's forcing (HighResMIP equivalent of pre-industrial control)",
            "experiment_id":"control-1950",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "spinup-1950"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "control-slab":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"slab control run for volc-pinatubo-slab",
            "end_year":"",
            "experiment":"control with slab ocean",
            "experiment_id":"control-slab",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM",
                "SLAB"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "dcppA-assim":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"A2.3 Assimilation runs used to generate initial conditions for hindcasts",
            "end_year":"2016",
            "experiment":"Assimilation run paralleling the historical simulation, which may be used to generate hindcast initial conditions",
            "experiment_id":"dcppA-assim",
            "min_number_yrs_per_sim":"56",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"before 1961",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppA-hindcast":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"A1 (and A2.1, A3.1, and A3.2) Decadal hindcasts begun near the end of each year from 1960 to 2019, or every other year at minimum. First full hindcast year follows start year (e.g., for s1960, first full hindcast year is 1961)",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast initialized based on observations and using historical forcing",
            "experiment_id":"dcppA-hindcast",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"a year in the range 1960-2019",
            "sub_experiment_id":[
                "s1960",
                "s1961",
                "s1962",
                "s1963",
                "s1964",
                "s1965",
                "s1966",
                "s1967",
                "s1968",
                "s1969",
                "s1970",
                "s1971",
                "s1972",
                "s1973",
                "s1974",
                "s1975",
                "s1976",
                "s1977",
                "s1978",
                "s1979",
                "s1980",
                "s1981",
                "s1982",
                "s1983",
                "s1984",
                "s1985",
                "s1986",
                "s1987",
                "s1988",
                "s1989",
                "s1990",
                "s1991",
                "s1992",
                "s1993",
                "s1994",
                "s1995",
                "s1996",
                "s1997",
                "s1998",
                "s1999",
                "s2000",
                "s2001",
                "s2002",
                "s2003",
                "s2004",
                "s2005",
                "s2006",
                "s2007",
                "s2008",
                "s2009",
                "s2010",
                "s2011",
                "s2012",
                "s2013",
                "s2014",
                "s2015",
                "s2016",
                "s2017",
                "s2018",
                "s2019"
            ],
            "tier":"1"
        },
        "dcppA-hindcast-niff":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"A4.1 Decadal hindcasts begun near the end of each year from 1960 to 2019, or every other year at minimum, but with no information from the future. First full hindcast year follows start year (e.g., for s1960, first full hindcast year is 1961)",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast initialized based on observations but without using knowledge of subsequent historical forcing",
            "experiment_id":"dcppA-hindcast-niff",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"a year in the range 1960-2019",
            "sub_experiment_id":[
                "s1960",
                "s1961",
                "s1962",
                "s1963",
                "s1964",
                "s1965",
                "s1966",
                "s1967",
                "s1968",
                "s1969",
                "s1970",
                "s1971",
                "s1972",
                "s1973",
                "s1974",
                "s1975",
                "s1976",
                "s1977",
                "s1978",
                "s1979",
                "s1980",
                "s1981",
                "s1982",
                "s1983",
                "s1984",
                "s1985",
                "s1986",
                "s1987",
                "s1988",
                "s1989",
                "s1990",
                "s1991",
                "s1992",
                "s1993",
                "s1994",
                "s1995",
                "s1996",
                "s1997",
                "s1998",
                "s1999",
                "s2000",
                "s2001",
                "s2002",
                "s2003",
                "s2004",
                "s2005",
                "s2006",
                "s2007",
                "s2008",
                "s2009",
                "s2010",
                "s2011",
                "s2012",
                "s2013",
                "s2014",
                "s2015",
                "s2016",
                "s2017",
                "s2018",
                "s2019"
            ],
            "tier":"4"
        },
        "dcppA-historical-niff":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"A4.2 Hindcasts initialized from historical climate simulations as in DCPP-A2.2, but with no information from the future. First full hindcast year follows start year (e.g., for s1960, first full hindcast year is 1961)",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast initialized from historical climate simulation but without using knowledge of subsequent historical forcing",
            "experiment_id":"dcppA-historical-niff",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"a year in the range 1960-2019",
            "sub_experiment_id":[
                "s1960",
                "s1961",
                "s1962",
                "s1963",
                "s1964",
                "s1965",
                "s1966",
                "s1967",
                "s1968",
                "s1969",
                "s1970",
                "s1971",
                "s1972",
                "s1973",
                "s1974",
                "s1975",
                "s1976",
                "s1977",
                "s1978",
                "s1979",
                "s1980",
                "s1981",
                "s1982",
                "s1983",
                "s1984",
                "s1985",
                "s1986",
                "s1987",
                "s1988",
                "s1989",
                "s1990",
                "s1991",
                "s1992",
                "s1993",
                "s1994",
                "s1995",
                "s1996",
                "s1997",
                "s1998",
                "s1999",
                "s2000",
                "s2001",
                "s2002",
                "s2003",
                "s2004",
                "s2005",
                "s2006",
                "s2007",
                "s2008",
                "s2009",
                "s2010",
                "s2011",
                "s2012",
                "s2013",
                "s2014",
                "s2015",
                "s2016",
                "s2017",
                "s2018",
                "s2019"
            ],
            "tier":"4"
        },
        "dcppB-forecast":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"B1 (and B2.1, B2.2) Ongoing decadal forecasts. First full forecast year follows start year (e.g., for s2017, first full forecast year is 2018)",
            "end_year":"5 years after start year",
            "experiment":"forecast initialized from observations with forcing from ssp245",
            "experiment_id":"dcppB-forecast",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"a year in the range 2017-2029",
            "sub_experiment_id":[
                "s2017",
                "s2018",
                "s2019",
                "s2020",
                "s2021",
                "s2022",
                "s2023",
                "s2024",
                "s2025",
                "s2026",
                "s2027",
                "s2028",
                "s2029"
            ],
            "tier":"1"
        },
        "dcppC-amv-ExTrop-neg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.7 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized climate impact of negative extratropical AMV anomaly pattern",
            "experiment_id":"dcppC-amv-ExTrop-neg",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-amv-ExTrop-pos":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.7Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized climate impact of positive extratropical AMV anomaly pattern",
            "experiment_id":"dcppC-amv-ExTrop-pos",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-amv-Trop-neg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.8 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized climate impact of negative tropical AMV anomaly pattern",
            "experiment_id":"dcppC-amv-Trop-neg",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-amv-Trop-pos":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.8 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized positive tropical AMV anomaly pattern",
            "experiment_id":"dcppC-amv-Trop-pos",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-amv-neg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.3 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized climate impact of negative AMV anomaly pattern",
            "experiment_id":"dcppC-amv-neg",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-amv-pos":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.2 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized climate impact of positive AMV anomaly pattern",
            "experiment_id":"dcppC-amv-pos",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-atl-control":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.1 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"Idealized Atlantic control",
            "experiment_id":"dcppC-atl-control",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-atl-pacemaker":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.11 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"2014",
            "experiment":"pacemaker Atlantic experiment",
            "experiment_id":"dcppC-atl-pacemaker",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1910, 1920 or 1950",
            "sub_experiment_id":[
                "s1910",
                "s1920",
                "s1950"
            ],
            "tier":"3"
        },
        "dcppC-atl-spg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C2.1 (and C2.2) Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs. First full hindcast year follows start year (e.g., for s1992, first full hindcast year is 1993)",
            "end_year":"5 - 10 years after start year",
            "experiment":"predictability of 1990s warming of Atlantic sub-polar gyre",
            "experiment_id":"dcppC-atl-spg",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"A year in the range 1992-1999",
            "sub_experiment_id":[
                "s1992",
                "s1993",
                "s1994",
                "s1995",
                "s1996",
                "s1997",
                "s1998",
                "s1999"
            ],
            "tier":"3"
        },
        "dcppC-forecast-addAgung":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.4 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 2015",
            "end_year":"5 - 10 years after start year",
            "experiment":"2015 forecast with added Agung forcing",
            "experiment_id":"dcppC-forecast-addAgung",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2014",
            "sub_experiment_id":[
                "s2014"
            ],
            "tier":"3"
        },
        "dcppC-forecast-addElChichon":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.5 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 2015",
            "end_year":"5 - 10 years after start year",
            "experiment":"2015 forecast with added El Chichon forcing",
            "experiment_id":"dcppC-forecast-addElChichon",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2014",
            "sub_experiment_id":[
                "s2014"
            ],
            "tier":"3"
        },
        "dcppC-forecast-addPinatubo":{
            "activity_id":[
                "DCPP",
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.6 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 2015",
            "end_year":"5 - 10 years after start year",
            "experiment":"2015 forecast with added Pinatubo forcing",
            "experiment_id":"dcppC-forecast-addPinatubo",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2014",
            "sub_experiment_id":[
                "s2014"
            ],
            "tier":"1"
        },
        "dcppC-hindcast-noAgung":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.3 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 1962",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast but with only background volcanic forcing to be the same as that used in the 2015 forecast",
            "experiment_id":"dcppC-hindcast-noAgung",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1962",
            "sub_experiment_id":[
                "s1962"
            ],
            "tier":"2"
        },
        "dcppC-hindcast-noElChichon":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.2 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 1982",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast but with only background volcanic forcing to be the same as that used in the 2015 forecast",
            "experiment_id":"dcppC-hindcast-noElChichon",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1981",
            "sub_experiment_id":[
                "s1981"
            ],
            "tier":"2"
        },
        "dcppC-hindcast-noPinatubo":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C3.1 Effects of volcanoes on decadal prediction and predictability of forced and internal variability components. First full hindcast year is 1991",
            "end_year":"5 - 10 years after start year",
            "experiment":"hindcast but with only background volcanic forcing to be the same as that used in the 2015 forecast",
            "experiment_id":"dcppC-hindcast-noPinatubo",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "no parent",
                "DCPP"
            ],
            "parent_experiment_id":[
                "no parent",
                "dcppA-assim"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1990",
            "sub_experiment_id":[
                "s1990"
            ],
            "tier":"1"
        },
        "dcppC-ipv-NexTrop-neg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.9 and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized negative northern extratropical IPV anomaly pattern",
            "experiment_id":"dcppC-ipv-NexTrop-neg",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-ipv-NexTrop-pos":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.9 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized positive northern extratropical IPV anomaly pattern",
            "experiment_id":"dcppC-ipv-NexTrop-pos",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "dcppC-ipv-neg":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.6 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized negative IPV anomaly pattern",
            "experiment_id":"dcppC-ipv-neg",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-ipv-pos":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.5 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized positive IPV anomaly pattern",
            "experiment_id":"dcppC-ipv-pos",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-pac-control":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.4 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs",
            "end_year":"",
            "experiment":"idealized Pacific control",
            "experiment_id":"dcppC-pac-control",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "dcppC-pac-pacemaker":{
            "activity_id":[
                "DCPP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"C1.10 Mechanisms and predictability of the hiatus and of similar long timescale variations of both signs. First full hindcast year is 2015",
            "end_year":"2014",
            "experiment":"pacemaker Pacific experiment",
            "experiment_id":"dcppC-pac-pacemaker",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1910, 1920 or 1950",
            "sub_experiment_id":[
                "s1910",
                "s1920",
                "s1950"
            ],
            "tier":"3"
        },
        "deforest-globe":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Idealized deforestation experiment, 20 million km2 forest removed linearly over a period of 50 years, with an additional 30 years with no specified change in forest cover; all other forcings held constant",
            "end_year":"",
            "experiment":"idealized transient global deforestation",
            "experiment_id":"deforest-globe",
            "min_number_yrs_per_sim":"81",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-1pct-brch-1000PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"A zero-emissions simulation (fully interactive CO2; emissions-driven configuration), initiated from the point in the 1pctCO2 experiment when the cumulative carbon emissions reach 1000 PgC",
            "end_year":"",
            "experiment":"zero emissions simulation branched from 1% run after 1000 PgC cumulative emission",
            "experiment_id":"esm-1pct-brch-1000PgC",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP",
                "C4MIP"
            ],
            "parent_experiment_id":[
                "1pctCO2",
                "esm-1pctCO2"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-1pct-brch-2000PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"A zero-emissions simulation (fully interactive CO2; emissions-driven configuration), initiated from the point in the 1pctCO2 experiment when the cumulative carbon emissions reach 2000 PgC",
            "end_year":"",
            "experiment":"zero emissions simulation branched from 1% run after 2000 PgC cumulative emission",
            "experiment_id":"esm-1pct-brch-2000PgC",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP",
                "C4MIP"
            ],
            "parent_experiment_id":[
                "1pctCO2",
                "esm-1pctCO2"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-1pct-brch-750PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"A zero-emissions simulation (fully interactive CO2; emissions-driven configuration), initiated from the point in the 1pctCO2 experiment when the cumulative carbon emissions reach 750 PgC",
            "end_year":"",
            "experiment":"zero emissions simulation branched from 1% run after 750 PgC cumulative emission",
            "experiment_id":"esm-1pct-brch-750PgC",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP",
                "C4MIP"
            ],
            "parent_experiment_id":[
                "1pctCO2",
                "esm-1pctCO2"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-1pctCO2":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"An emissions-driven simulation (fully interactive CO2), initiated from the esm-piControl using CO2 emissions diagnosed from the 1pctCO2 experiment so that the emissions-driven run replicates as closely as possible the 1pctCO2 concentration profile",
            "end_year":"",
            "experiment":"emissions driven 1% run",
            "experiment_id":"esm-1pctCO2",
            "min_number_yrs_per_sim":"150",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-bell-1000PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"An emissions-driven simulation (fully interactive CO2), initiated from esm-piControl using CO2 emissions, amounting to 1000 PgC, following a bell-shape curve for 100 years followed by zero-emissions for 100 years",
            "end_year":"",
            "experiment":"emissions driven 1000PgC bell-curve",
            "experiment_id":"esm-bell-1000PgC",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-bell-2000PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"An emissions-driven simulation (fully interactive CO2), initiated from esm-piControl using CO2 emissions, amounting to 2000 PgC, following a bell-shape curve for 100 years followed by zero-emissions for 100 years",
            "end_year":"",
            "experiment":"emissions driven 2000PgC bell-curve",
            "experiment_id":"esm-bell-2000PgC",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-bell-750PgC":{
            "activity_id":[
                "C4MIP",
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"An emissions-driven simulation (fully interactive CO2), initiated from esm-piControl using CO2 emissions, amounting to 750 PgC, following a bell-shape curve for 100 years followed by zero-emissions for 100 years",
            "end_year":"",
            "experiment":"emissions driven 750PgC bell-curve",
            "experiment_id":"esm-bell-750PgC",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-hist":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"CMIP6 historical (CO2 emission-driven)",
            "end_year":"2014",
            "experiment":"all-forcing simulation of the recent past with atmospheric CO2 concentration calculated",
            "experiment_id":"esm-hist",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-hist-ext":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Extension beyond 2014 of the CMIP6 historical (CO2 emission-driven)",
            "end_year":"present",
            "experiment":"post-2014 all-forcing simulation with atmospheric CO2 concentration calculated",
            "experiment_id":"esm-hist-ext",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-hist"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-past1000":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Parallel experiment to past1000, but for model set-ups with interactive carbon cycle. Main forcings: trace gases, volcanoes, solar variability, land-use",
            "end_year":"1849",
            "experiment":"last millennium experiment with interactive carbon cycle",
            "experiment_id":"esm-past1000",
            "min_number_yrs_per_sim":"1000",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-pi-CO2pulse":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"100 Gt C instantly added (positive pulse) to a pre-industrial atmosphere (part of the CDR-pi-pulse experiment)",
            "end_year":"",
            "experiment":"pulse addition of 100 Gt carbon to pre-industrial atmosphere",
            "experiment_id":"esm-pi-CO2pulse",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-pi-cdr-pulse":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"100 Gt C instantly removed (negative pulse) from a pre-industrial atmosphere (part of the CDR-pi-pulse experiment)",
            "end_year":"",
            "experiment":"pulse removal of 100 Gt carbon from pre-industrial atmosphere",
            "experiment_id":"esm-pi-cdr-pulse",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-piControl":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"DECK: control (emission-driven)",
            "end_year":"",
            "experiment":"pre-industrial control simulation with CO2 concentration calculated",
            "experiment_id":"esm-piControl",
            "min_number_yrs_per_sim":"500",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl-spinup"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-piControl-spinup":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"DECK: spin-up portion of the control (emission-driven)",
            "end_year":"",
            "experiment":"pre-industrial control simulation with CO2 concentration calculated (spin-up)",
            "experiment_id":"esm-piControl-spinup",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-ssp534-over":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"CO2 emissions driven SSP5-3.4 overshoot scenario simulation optionally extending to year 2300 (part of the CDR-overshoot experiment)",
            "end_year":"2100 or 2300",
            "experiment":"emission-driven SSP5-3.4-OS scenario",
            "experiment_id":"esm-ssp534-over",
            "min_number_yrs_per_sim":"61",
            "parent_activity_id":[
                "C4MIP"
            ],
            "parent_experiment_id":[
                "esm-ssp585"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2040",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-ssp585":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Emissions-driven future scenario simulation",
            "end_year":"2100",
            "experiment":"emission-driven RCP8.5 based on SSP5",
            "experiment_id":"esm-ssp585",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-hist"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-ssp585-ocn-alk":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"emission driven SSP5-8.5 scenario with 0.14 Pmol/yr alkalinity added to ice free ocean surface waters from 2020 optionally extended from 2100 to 2300 (part of the CDR-ocean-alk experiment)",
            "end_year":"2100 or 2300",
            "experiment":"emission-driven SSP5-8.5 scenario but with ocean alkalinization from year 2020 onward",
            "experiment_id":"esm-ssp585-ocn-alk",
            "min_number_yrs_per_sim":"81",
            "parent_activity_id":[
                "C4MIP"
            ],
            "parent_experiment_id":[
                "esm-ssp585"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-ssp585-ocn-alk-stop":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Simulation of abrupt termination of ocean alkalinsation in 2070 during an emission driven SSP5-8.5 scenario (part of the CDR-ocean-alk experiment)",
            "end_year":"2100",
            "experiment":"emission-driven SSP5-8.5 scenario with alkalinization terminated in year 2070",
            "experiment_id":"esm-ssp585-ocn-alk-stop",
            "min_number_yrs_per_sim":"31",
            "parent_activity_id":[
                "CDRMIP"
            ],
            "parent_experiment_id":[
                "esm-ssp585-ocn-alk"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2070",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-ssp585-ssp126Lu":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Additional land use policy sensitivity simulation for high radiative forcing scenario, keep all forcings the same as in C4MIP esmssp5-8.5 scenario except use SSP1-2.6 land use; emission driven",
            "end_year":"2100",
            "experiment":"emissions-driven SSP5-8.5 with SSP1-2.6 land use",
            "experiment_id":"esm-ssp585-ssp126Lu",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "esm-hist"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "esm-ssp585-ssp126Lu-ext":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Long term extension of CO2 emissions driven SSP5-8.5 with SSP1-2.6 land use forcing (part of the CDR-afforestation experiment)",
            "end_year":"2300",
            "experiment":"extension of the LUMIP emissions-driven simulation following SSP5-8.5 with SSP1-2.6 land use",
            "experiment_id":"esm-ssp585-ssp126Lu-ext",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "LUMIP"
            ],
            "parent_experiment_id":[
                "esm-ssp585-ssp126Lu"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2101",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-ssp585ext":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Long term extension of CO2 emissions driven SSP5-8.5 scenario (used in the CDR-afforestation and CDR-ocean-alk experiments)",
            "end_year":"2300",
            "experiment":"emission-driven long-term extension of the SSP5-8.5 scenario",
            "experiment_id":"esm-ssp585ext",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "C4MIP"
            ],
            "parent_experiment_id":[
                "esm-ssp585"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2101",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "esm-yr2010CO2-CO2pulse":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Upon initialization from end of year 2015 of esm-yr2010CO2-control instantaneously introduce 100 Gt C (\"positive pulse\"; part of the CDR-yr2010-pulse experiment)",
            "end_year":"2115",
            "experiment":"instantaneous 100 Gt C addition to an industrial era atmosphere",
            "experiment_id":"esm-yr2010CO2-CO2pulse",
            "min_number_yrs_per_sim":"101",
            "parent_activity_id":[
                "CDRMIP"
            ],
            "parent_experiment_id":[
                "esm-yr2010CO2-control"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-yr2010CO2-cdr-pulse":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Upon initialization from end of year 2015 of esm-yr2010CO2-control instantaneously remove 100 Gt C (\"negative pulse\"; part of the CDR-yr2010-pulse experiment",
            "end_year":"2115",
            "experiment":"instantaneous 100 Gt C removal from industrial era atmosphere",
            "experiment_id":"esm-yr2010CO2-cdr-pulse",
            "min_number_yrs_per_sim":"101",
            "parent_activity_id":[
                "CDRMIP"
            ],
            "parent_experiment_id":[
                "esm-yr2010CO2-control"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-yr2010CO2-control":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Forced with CO2 emissions diagnosed from historical and yr2010CO2 simulations and all other forcings the same as in that simulation (part of the CDR-yr2010-pulse experiment)",
            "end_year":"2115",
            "experiment":"historical emissions followed by fixed 2010 emissions (both model-diagnosed)",
            "experiment_id":"esm-yr2010CO2-control",
            "min_number_yrs_per_sim":"266",
            "parent_activity_id":[
                "CDRMIP"
            ],
            "parent_experiment_id":[
                "esm-piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "esm-yr2010CO2-noemit":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Upon initialization from end of year 2015 of esm-yr2010-control CO2 emissions are fixed at zero; all other forcing fixed at 2010 level (part of the CDR-yr2010-pulse experiment)",
            "end_year":"2115",
            "experiment":"branches from esm-yr2010CO2-control with zero emissions",
            "experiment_id":"esm-yr2010CO2-noemit",
            "min_number_yrs_per_sim":"101",
            "parent_activity_id":[
                "CDRMIP"
            ],
            "parent_experiment_id":[
                "esm-yr2010CO2-control"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "faf-all":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean simultaneously by surface windstress (as in the wind experiment), net heat flux (as in the heat experiment) and net freshwater flux (as in the water experiment) anomalies obtained from the CMIP5 ensemble mean of 1pctCO2 experiments at the time of 2xCO2, using a passive tracer to prevent negative climate feedback on the heat flux applied",
            "end_year":"",
            "experiment":"control plus perturbative surface fluxes of momentum, heat and water into ocean",
            "experiment_id":"faf-all",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "faf-antwater-stress":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean with the momentum flux perturbation field of faf-stress and a surface freshwater flux of 0.1 Sv in total to be applied uniformly around the coast of Antarctica in whatever way is most suitable in the model",
            "end_year":"",
            "experiment":"control plus perturbative surface fluxes of momentum and freshwater into ocean, the latter around the coast of Antarctica only",
            "experiment_id":"faf-antwater-stress",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "faf-heat":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean by surface net heat flux anomalies obtained from the CMIP5 ensemble mean of 1pctCO2 experiments at the time of 2xCO2, using a passive tracer to prevent negative climate feedback on the heat flux applied",
            "end_year":"",
            "experiment":"control plus perturbative surface flux of heat into ocean",
            "experiment_id":"faf-heat",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "faf-heat-NA0pct":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean by the same method and with the same surface net heat flux perturbation field as in faf-heat, except that within part of the North Atlantic ocean the perturbation is zero",
            "end_year":"",
            "experiment":"control plus perturbative surface flux of heat into ocean",
            "experiment_id":"faf-heat-NA0pct",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "faf-heat-NA50pct":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean by the same method and with the same surface net heat flux perturbation field as in faf-heat, except that within part of the North Atlantic ocean the perturbation is multiplied by 0.5",
            "end_year":"",
            "experiment":"control plus perturbative surface flux of heat into ocean",
            "experiment_id":"faf-heat-NA50pct",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "faf-passiveheat":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, with a flux of passive tracer added at the ocean surface at the same rate as the surface net heat flux anomaly applied in the FAFMIP heat experiment",
            "end_year":"",
            "experiment":"control plus surface flux of passive heat tracer into ocean",
            "experiment_id":"faf-passiveheat",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "faf-stress":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean by surface windstress anomalies obtained from the CMIP5 ensemble mean of 1pctCO2 experiments at the time of 2xCO2",
            "end_year":"",
            "experiment":"control plus perturbative surface flux of momentum into ocean",
            "experiment_id":"faf-stress",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "faf-water":{
            "activity_id":[
                "FAFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1xCO2 experiment, parallel to piControl, forced over the ocean by surface net freshwater flux anomalies obtained from the CMIP5 ensemble mean of 1pctCO2 experiments at the time of 2xCO2",
            "end_year":"",
            "experiment":"control plus perturbative surface flux of water into ocean",
            "experiment_id":"faf-water",
            "min_number_yrs_per_sim":"70",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "futSST-pdSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.4: investigate role of SST in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with future SST and present day SIC",
            "experiment_id":"futSST-pdSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "futureSST-4xCO2-solar":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at year 100 of G1ext to examine radiative forcing of abrupt-4xCO2 and G1",
            "end_year":"",
            "experiment":"year 100 SSTs from abrupt-4xCO2 with quadrupled CO2 and solar reduction",
            "experiment_id":"futureSST-4xCO2-solar",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "GeoMIP"
            ],
            "parent_experiment_id":[
                "G1"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "highres-future":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Coupled integrations with SSP5 forcing (nearest to CMIP5 RCP8.5 (as in highresSST-future)",
            "end_year":"2050",
            "experiment":"coupled future 2015-2050 using a scenario as close to CMIP5 RCP8.5 as possible within CMIP6",
            "experiment_id":"highres-future",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "hist-1950"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "highresSST-4xCO2":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Similar to CFMIP amip-4xCO2, SSTs are held at highresSST-present values and the CO2 seen by the radiation scheme is quadrupled",
            "end_year":"2014",
            "experiment":"highresSST-present SST with 4xCO2 concentrations",
            "experiment_id":"highresSST-4xCO2",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "highresSST-present"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "highresSST-LAI":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Forced global atmosphere-land simulations as highresSST-present, but using an common LAI dataset across models",
            "end_year":"2014",
            "experiment":"common LAI dataset within the highresSST-present experiment",
            "experiment_id":"highresSST-LAI",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "highresSST-present"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "highresSST-future":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Extend highresSST-present to 2050 with agreed SSP5/RCP8.5 forcings (with option to extend further to 2100)",
            "end_year":"2050",
            "experiment":"forced atmosphere experiment for 2015-2050 using SST/sea-ice derived from CMIP5 RCP8.5 simulations and a scenario as close to RCP8.5 as possible within CMIP6",
            "experiment_id":"highresSST-future",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "highresSST-present"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "highresSST-p4K":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Similar to CFMIP amip-p4K, add a uniform warming of 4K to highresSST-present SSTs and run the experiment parallel to highresSST-present",
            "end_year":"2014",
            "experiment":"uniform 4K warming of highresSST-present SST",
            "experiment_id":"highresSST-p4K",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "highresSST-present"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "highresSST-present":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Forced global atmosphere-land simulations using daily 1/4 degree SST and sea-ice forcings, and aerosol optical properties (not emissions) to constrain model spread",
            "end_year":"2014",
            "experiment":"forced atmosphere experiment for 1950-2014",
            "experiment_id":"highresSST-present",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1950",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "highresSST-smoothed":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Forced global atmosphere-land simulations as highresSST-present, but using smoothed SST to investigate impact of SST variability",
            "end_year":"2014",
            "experiment":"smoothed SST version of highresSST-present",
            "experiment_id":"highresSST-smoothed",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "highresSST-present"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-1950":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Coupled integrations with historic external forcings (as in highresSST-present)",
            "end_year":"2014",
            "experiment":"coupled historical 1950-2014",
            "experiment_id":"hist-1950",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "HighResMIP"
            ],
            "parent_experiment_id":[
                "spinup-1950"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1950",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-1950HC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Historical WMGHG concentrations and NTCF emissions, 1950 halocarbon concentrations, start 1950",
            "end_year":"2014",
            "experiment":"historical forcing, but with1950s halocarbon concentrations; initialized in 1950",
            "experiment_id":"hist-1950HC",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"1950",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-CO2":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical CO2-only run",
            "end_year":"2020",
            "experiment":"historical CO2-only run",
            "experiment_id":"hist-CO2",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-GHG":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical well-mixed GHG-only run. Models with interactive chemistry schemes should either turn off the chemistry or use a preindustrial climatology of stratospheric and tropospheric ozone in their radiation schemes. This will ensure that ozone is fixed in all these simulations, and simulated responses in models with and without coupled chemistry are comparable",
            "end_year":"2020",
            "experiment":"historical well-mixed GHG-only run",
            "experiment_id":"hist-GHG",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-GHG-cmip5":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"historical well-mixed GHG-only run. Models with interactive chemistry schemes should either turn off the chemistry or use a preindustrial climatology of stratospheric and tropospheric ozone in their radiation schemes. This will ensure that ozone is fixed in all these simulations, and simulated responses in models with and without coupled chemistry are comparable (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "end_year":"2020",
            "experiment":"historical well-mixed GHG-only run (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "experiment_id":"hist-GHG-cmip5",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-aer":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"historical anthropogenic aerosols-only run",
            "end_year":"2020",
            "experiment":"historical anthropogenic aerosols-only run",
            "experiment_id":"hist-aer",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-aer-cmip5":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"historical anthropogenic aerosols-only run (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "end_year":"2020",
            "experiment":"historical anthropogenic aerosols-only run (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "experiment_id":"hist-aer-cmip5",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-all-aer2":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical ALL forcing run with alternate estimates of aerosol concentrations/emissions",
            "end_year":"2020",
            "experiment":"historical ALL-forcing run with alternate estimates of aerosol forcing",
            "experiment_id":"hist-all-aer2",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-all-nat2":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical ALL forcing run with alternates estimate of solar and volcanic forcing",
            "end_year":"2020",
            "experiment":"historical ALL-forcing run with alternate estimates of natural forcing",
            "experiment_id":"hist-all-nat2",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-bgc":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Concentration-driven historical simulation, biogeochemically-coupled",
            "end_year":"2014",
            "experiment":"biogeochemically-coupled version of the simulation of the recent past with CO2 concentration prescribed",
            "experiment_id":"hist-bgc",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-nat":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical natural-only run",
            "end_year":"2020",
            "experiment":"historical natural-only run",
            "experiment_id":"hist-nat",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-nat-cmip5":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"historical natural-only run (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "end_year":"2020",
            "experiment":"historical natural-only run (CMIP5-era historical [1850-2005] and RCP4.5 [2006-2020] forcing)",
            "experiment_id":"hist-nat-cmip5",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-noLu":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Same as CMIP6 historical but with land cover held at 1850, no human activity; concentration driven",
            "end_year":"2014",
            "experiment":"historical with no land-use change",
            "experiment_id":"hist-noLu",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-piAer":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Historical WMGHG, halocarbon concentrations and O3 precursor emissions, 1850 aerosol precursor emissions",
            "end_year":"2014",
            "experiment":"historical forcing, but with pre-industrial aerosol emissions",
            "experiment_id":"hist-piAer",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "AER"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-piNTCF":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Historical WMGHG and halocarbons concentrations, 1850 NTCF emissions",
            "end_year":"2014",
            "experiment":"historical forcing, but with pre-industrial NTCF emissions",
            "experiment_id":"hist-piNTCF",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM",
                "AER"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-resAMO":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Pacemaker 20th century historical run that includes all forcing as used in CMIP6 Historical Simulation, and the observational historical SST is restored in the AMO domain (0deg-70degN, 70degW-0deg)",
            "end_year":"2014",
            "experiment":"initialized from \"historical\" run year 1870 and SSTs in the AMO domain (0deg-70degN, 70degW-0deg) restored to AMIP SSTs with historical forcings",
            "experiment_id":"hist-resAMO",
            "min_number_yrs_per_sim":"145",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1870",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-resIPO":{
            "activity_id":[
                "GMMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Pacemaker 20th century historical run that includes all forcing as used in CMIP6 Historical Simulation, and the observational historical SST is restored in the tropical lobe of the IPO domain (20degS-20degN, 175degE-75degW)",
            "end_year":"2014",
            "experiment":"initialized from \"historical\" run year 1870 and SSTs in tropical lobe of the IPO domain (20degS-20degN, 175degE-75degW) restored to AMIP SSTs with historical forcings",
            "experiment_id":"hist-resIPO",
            "min_number_yrs_per_sim":"145",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1870",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-sol":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical solar-only transient simulation using settings from CMIP6 historical simulation but fixed GHG and ODS (1850 level)",
            "end_year":"2020",
            "experiment":"historical solar-only run",
            "experiment_id":"hist-sol",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-spAer-aer":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. Changes in aerosols only",
            "end_year":"2014",
            "experiment":"historical simulation with specified anthropogenic aerosols, no other forcings",
            "experiment_id":"hist-spAer-aer",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-spAer-all":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. All forcings",
            "end_year":"2014",
            "experiment":"historical simulation with specified anthropogenic aerosols",
            "experiment_id":"hist-spAer-all",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "hist-stratO3":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "BGC"
            ],
            "description":"Historical stratospheric ozone-only. In models with coupled chemistry, the chemistry scheme should be turned off, and the simulated ensemble mean monthly mean 3D stratospheric ozone concentrations from the CMIP6 historical simulations should be prescribed. Tropospheric ozone should be fixed at 3D long-term monthly mean piControl values, with a value of 100 ppbv ozone concentration in this piControl climatology used to separate the troposphere from the stratosphere. In models without coupled chemistry the same stratospheric ozone prescribed in the CMIP6 historical simulations should be prescribed. Stratospheric ozone concentrations will be provided by CCMI",
            "end_year":"2020",
            "experiment":"historical stratospheric ozone-only run",
            "experiment_id":"hist-stratO3",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "hist-totalO3":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "BGC"
            ],
            "description":"Historical total ozone-only. In models with coupled chemistry, the chemistry scheme should be turned off, and the simulated ensemble mean monthly mean 3D ozone concentrations from the CMIP6 historical simulations should be prescribed through the depth of the atmosphere. In models without coupled chemistry the same ozone prescribed in the CMIP6 historical simulations should be prescribed",
            "end_year":"2020",
            "experiment":"historical total ozone-only run",
            "experiment_id":"hist-totalO3",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "hist-volc":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical volcanic-only run",
            "end_year":"2020",
            "experiment":"historical volcanic-only run",
            "experiment_id":"hist-volc",
            "min_number_yrs_per_sim":"171",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "histSST":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Historical transient with SSTs prescribed from historical",
            "end_year":"2014",
            "experiment":"historical prescribed SSTs and historical forcing",
            "experiment_id":"histSST",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "histSST-1950HC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Historical WMGHG concentrations and NTCF emissions, 1950 halocarbon concentrations",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with 1950 halocarbon concentrations. Experiment is initialized from histSST (AerChemMIP) simulation from January 1950",
            "experiment_id":"histSST-1950HC",
            "min_number_yrs_per_sim":"65",
            "parent_activity_id":[
                "AerChemMIP"
            ],
            "parent_experiment_id":[
                "histSST"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"1950",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "histSST-noLu":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"An uncoupled (atmosphere and land) experiment in which sea surface temperatures (SST) and sea ice concentrations (SICONC) are taken from historical (as in existing histSST experiment). All forcing agents to follow historical except LULCC. LULCC set to 1850 (exactly following hist-noLu prescription)",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with pre-industrial LULCC",
            "experiment_id":"histSST-noLu",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "histSST-piAer":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Historical WMGHG, halocarbon concentrations and tropospheric ozone precursors emissions, 1850 aerosol precursor emissions, prescribed SSTs",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with pre-industrial aerosol emissions",
            "experiment_id":"histSST-piAer",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "histSST-piCH4":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Historical (non-CH4) WMGHG concentrations and NTCF emissions, 1850 CH4 concentrations",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with pre-industrial methane concentrations",
            "experiment_id":"histSST-piCH4",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "histSST-piN2O":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Historical (non-N2O) WMGHG concentrations and NTCF emissions, 1850 N2O concentrations",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcings, but with pre-industrial N2O concentrations",
            "experiment_id":"histSST-piN2O",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "histSST-piNTCF":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Historical WMGHG concentrations and halocarbons emissions, 1850 NTCF emissions, prescribed SSTs",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with pre-industrial NTCF emissions",
            "experiment_id":"histSST-piNTCF",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "histSST-piO3":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Historical WMGHG, halocarbon concentrations and aerosol precursor emissions, 1850 tropospheric ozone precursors emissions, prescribed SSTs",
            "end_year":"2014",
            "experiment":"historical SSTs and historical forcing, but with pre-industrial ozone precursor emissions",
            "experiment_id":"histSST-piO3",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "historical":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"CMIP6 historical",
            "end_year":"2014",
            "experiment":"all-forcing simulation of the recent past",
            "experiment_id":"historical",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP",
                "PMIP"
            ],
            "parent_experiment_id":[
                "piControl",
                "past1000",
                "past2k"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "historical-cmip5":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"CMIP5 historical experiment, using CMIP5-era [1850-2005] forcing",
            "end_year":"2005",
            "experiment":"all-forcing simulation of the recent past (CMIP5-era [1850-2005] forcing)",
            "experiment_id":"historical-cmip5",
            "min_number_yrs_per_sim":"156",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "historical-ext":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Extension beyond 2014 of the CMIP6 historical",
            "end_year":"present",
            "experiment":"post-2014 all-forcing simulation",
            "experiment_id":"historical-ext",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "historical-withism":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Historical simulation that includes interactive ice sheets. Set up follows the historical experiment",
            "end_year":"2014",
            "experiment":"historical with interactive ice sheet",
            "experiment_id":"historical-withism",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "piControl-withism"
            ],
            "required_model_components":[
                "AOGCM",
                "ISM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ism-1pctCO2to4x-self":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Idealized 1%/yr CO2 increase to 4xC02 over 140yrs and kept constant at 4xCO2 for an additional 200 to 400 yrs simulation with ice sheets forced \"offline\" with DECK 1pctCO2 using forcing from its own AOGCM",
            "end_year":"",
            "experiment":"offline ice sheet model forced by ISM's own AOGCM 1pctCO2to4x output",
            "experiment_id":"ism-1pctCO2to4x-self",
            "min_number_yrs_per_sim":"350",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-piControl-self"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-1pctCO2to4x-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Idealized 1%/yr CO2 increase to 4xC02 over 140yrs and kept constant at 4xCO2 for an additional 200 to 400 yrs simulation with ice sheets forced \"offline\" with DECK 1pctCO2 using a standard forcing",
            "end_year":"",
            "experiment":"offline ice sheet model forced by ISMIP6-specified AOGCM 1pctCO2to4x output",
            "experiment_id":"ism-1pctCO2to4x-std",
            "min_number_yrs_per_sim":"350",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-pdControl-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-amip-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Offline ice sheet evolution for the last few decades forced by amip",
            "end_year":"2014",
            "experiment":"offline ice sheet forced by ISMIP6-specified AGCM AMIP output",
            "experiment_id":"ism-amip-std",
            "min_number_yrs_per_sim":"36",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-ctrl-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"1979",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ism-asmb-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Offline ice sheet simulation with synthetic atmospheric dataset to explore the uncertainty in sea level due to ice sheet initialization",
            "end_year":"",
            "experiment":"offline ice sheet forced by initMIP synthetic atmospheric experiment",
            "experiment_id":"ism-asmb-std",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-ctrl-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-bsmb-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Offline ice sheet simulation with synthetic oceanic dataset to explore the uncertainty in sea level due to ice sheet initialization",
            "end_year":"",
            "experiment":"offline ice sheet forced by initMIP synthetic oceanic experiment",
            "experiment_id":"ism-bsmb-std",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-ctrl-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-ctrl-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Offline ice sheet control run for the initMIP experiment that explores the uncertainty in sea level due to ice sheet initialization",
            "end_year":"",
            "experiment":"offline ice sheet model initMIP control",
            "experiment_id":"ism-ctrl-std",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-historical-self":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Historical simulation using \"offline\" ice sheet models. Forcing for ice sheet model is from its own AOGCM",
            "end_year":"2014",
            "experiment":"offline ice sheet forced by ISM's own AOGCM historical output",
            "experiment_id":"ism-historical-self",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-piControl-self"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ism-historical-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Historical simulation using \"offline\" ice sheet models. Forcing for ice sheet model is the standard dataset based on CMIP6 AOGCM historical",
            "end_year":"2014",
            "experiment":"offline ice sheet forced by ISMIP6-specified AOGCM historical output",
            "experiment_id":"ism-historical-std",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-pdControl-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ism-lig127k-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Last interglacial simulation of ice sheet evolution driven by PMIP lig127k",
            "end_year":"",
            "experiment":"offline ice sheet forced by ISMIP6-specified AGCM last interglacial output",
            "experiment_id":"ism-lig127k-std",
            "min_number_yrs_per_sim":"20000",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ism-pdControl-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Present-day control simulation for \"offline\" ice sheets",
            "end_year":"",
            "experiment":"offline ice sheet forced by ISMIP6-specified AOGCM pdControl output",
            "experiment_id":"ism-pdControl-std",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-piControl-self":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Pre-industrial control simulation for \"offline\" ice sheets",
            "end_year":"",
            "experiment":"offline ice sheet forced by ISM's own AOGCM piControl output",
            "experiment_id":"ism-piControl-self",
            "min_number_yrs_per_sim":"500",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ism-ssp585-self":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Future climate ScenarioMIP SSP5-8.5 simulation using \"offline\" ice sheet models. Forcing for ice sheet model is from its own AOGCM",
            "end_year":"2100 or 2300",
            "experiment":"offline ice sheet forced by ISM's own AOGCM ssp585 output",
            "experiment_id":"ism-ssp585-self",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-historical-self"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ism-ssp585-std":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Future climate ScenarioMIP SSP5-8.5 simulation using \"offline\" ice sheet models. Forcing for ice sheet model is the standard dataset based on ScenarioMIP ssp585",
            "end_year":"2100 or 2300",
            "experiment":"offline ice sheet forced by ISMIP6-specified AOGCM ssp585 output",
            "experiment_id":"ism-ssp585-std",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "ism-historical-std"
            ],
            "required_model_components":[
                "ISM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-cCO2":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist except with CO2 held constant",
            "end_year":"2014",
            "experiment":"historical land-only constant CO2",
            "experiment_id":"land-cCO2",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-cClim":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist except with climate held constant",
            "end_year":"2014",
            "experiment":"historical land-only constant climate",
            "experiment_id":"land-cClim",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-crop-grass":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with all new crop and pastureland treated as unmanaged grassland",
            "end_year":"2014",
            "experiment":"historical land-only with cropland as natural grassland",
            "experiment_id":"land-crop-grass",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-crop-noFert":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with fertilization rates and area held at 1850 levels/distribution",
            "end_year":"2014",
            "experiment":"historical land-only with no fertilizer",
            "experiment_id":"land-crop-noFert",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-crop-noIrrig":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with irrigated area held at 1850 levels",
            "end_year":"2014",
            "experiment":"historical land-only with no irrigation",
            "experiment_id":"land-crop-noIrrig",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-crop-noIrrigFert":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist except with plants in cropland area utilizing at least some form of crop management (e.g., planting and harvesting) rather than simulating cropland vegetation as a natural grassland. Irrigated area and fertilizer area/use should be held constant",
            "end_year":"2014",
            "experiment":"historical land-only with managed crops but with irrigation and fertilization held constant",
            "experiment_id":"land-crop-noIrrigFert",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-hist":{
            "activity_id":[
                "LS3MIP",
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"historical land-only",
            "experiment_id":"land-hist",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "land-hist-altLu1":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"historical land-only alternate land-use history",
            "experiment_id":"land-hist-altLu1",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-hist-altLu2":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"historical land-only alternate land use history",
            "experiment_id":"land-hist-altLu2",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-hist-altStartYear":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist except starting from either 1700 (for models that typically start in 1850) or 1850 (for models that typically start in 1700)",
            "end_year":"2014",
            "experiment":"historical land-only alternate start year",
            "experiment_id":"land-hist-altStartYear",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "land-hist-cruNcep":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"as land-hist with CRU-NCEP forcings",
            "experiment_id":"land-hist-cruNcep",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-hist-princeton":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"as land-hist with Princeton forcings",
            "experiment_id":"land-hist-princeton",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-hist-wfdei":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Land only simulations",
            "end_year":"2014",
            "experiment":"as land-hist with WFDEI forcings",
            "experiment_id":"land-hist-wfdei",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-noFire":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with anthropogenic ignition and suppression held to 1850 levels",
            "end_year":"2014",
            "experiment":"historical land-only with no human fire management",
            "experiment_id":"land-noFire",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-noLu":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Same as land-hist except no land-use change",
            "end_year":"2014",
            "experiment":"historical land-only with no land-use change",
            "experiment_id":"land-noLu",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "land-noPasture":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with grazing and other management on pastureland held at 1850 levels/distribution, i.e. all new pastureland is treated as unmanaged grassland (as in land-crop-grass)",
            "end_year":"2014",
            "experiment":"historical land-only with constant pastureland",
            "experiment_id":"land-noPasture",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-noShiftCultivate":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist except shifting cultivation turned off. An additional LUC transitions dataset will be provided as a data layer within LUMIP LUH2 dataset with shifting cultivation deactivated",
            "end_year":"2014",
            "experiment":"historical land-only with shifting cultivation turned off",
            "experiment_id":"land-noShiftCultivate",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-noWoodHarv":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Same as land-hist but with wood harvest maintained at 1850 amounts/areas",
            "end_year":"2014",
            "experiment":"historical land-only with no wood harvest",
            "experiment_id":"land-noWoodHarv",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND",
                "BGC"
            ],
            "start_year":"1850 or 1700",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-ssp126":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"land only simulation for ssp1-2.6",
            "end_year":"2100",
            "experiment":"future ssp1-2.6 land only",
            "experiment_id":"land-ssp126",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "land-ssp434":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"land only simulation for ssp4-3.4",
            "end_year":"2100",
            "experiment":"future ssp4-3.4 land only",
            "experiment_id":"land-ssp434",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "land-ssp585":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"land only simulation for ssp5-8.5",
            "end_year":"2100",
            "experiment":"future ssp5-8.5 land only",
            "experiment_id":"land-ssp585",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "LAND"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "lfmip-initLC":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Initialized pseudo-observations land",
            "end_year":"2014",
            "experiment":"initialized from \"historical\" run year 1980, but with land conditions initialized from pseudo-observations",
            "experiment_id":"lfmip-initLC",
            "min_number_yrs_per_sim":"35",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-pdLC":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 1980-2014 climate",
            "end_year":"2100",
            "experiment":"prescribed land conditions (from current climate climatology) and initialized from \"historical\" run year 1980",
            "experiment_id":"lfmip-pdLC",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "lfmip-pdLC-cruNcep":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 1980-2014 climate with Land-Hist-cruNcep",
            "end_year":"2100",
            "experiment":"as LFMIP-pdLC with Land-Hist-cruNcep",
            "experiment_id":"lfmip-pdLC-cruNcep",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-pdLC-princeton":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 1980-2014 climate with Land-Hist-princeton",
            "end_year":"2100",
            "experiment":"as LFMIP-pdLC with Land-Hist-princeton",
            "experiment_id":"lfmip-pdLC-princeton",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-pdLC-wfdei":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 1980-2014 climate with Land-Hist-wfdei",
            "end_year":"2100",
            "experiment":"as LFMIP-pdLC with Land-Hist-wfdei",
            "experiment_id":"lfmip-pdLC-wfdei",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-rmLC":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 30yr running mean",
            "end_year":"2100",
            "experiment":"prescribed land conditions (from running mean climatology) and initialized from \"historical\" run year 1980",
            "experiment_id":"lfmip-rmLC",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-rmLC-cruNcep":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 30yr running mean with Land-Hist-cruNcep",
            "end_year":"2100",
            "experiment":"as LFMIP-rmLC with Land-Hist-cruNcep",
            "experiment_id":"lfmip-rmLC-cruNcep",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-rmLC-princeton":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 30yr running mean with Land-Hist-princeton",
            "end_year":"2100",
            "experiment":"as LFMIP-rmLC with Land-Hist-princeton",
            "experiment_id":"lfmip-rmLC-princeton",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lfmip-rmLC-wfdei":{
            "activity_id":[
                "LS3MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Prescribed land conditions 30yr running mean with Land-Hist-wfdei",
            "end_year":"2100",
            "experiment":"as LFMIP-rmLC with Land-Hist-wfdei",
            "experiment_id":"lfmip-rmLC-wfdei",
            "min_number_yrs_per_sim":"121",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1980",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "lgm":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"main forcings: ice-sheet; trace gases, astronomical parameters, dust (forcing, or feedback if dust cycle represented in model)",
            "end_year":"",
            "experiment":"last glacial maximum",
            "experiment_id":"lgm",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "lig127k":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"main forcings: astronomical parameters, trace gases, dust (forcing, or feedback if dust cycle represented in model)",
            "end_year":"",
            "experiment":"last interglacial (127k)",
            "experiment_id":"lig127k",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "midHolocene":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"main forcings: trace gases, orbital parameters, dust (forcing, or feedback if dust cycle represented in model)",
            "end_year":"",
            "experiment":"mid-Holocene",
            "experiment_id":"midHolocene",
            "min_number_yrs_per_sim":"200",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "midPliocene-eoi400":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"main forcings: trace gases, orography, ice-sheet",
            "end_year":"",
            "experiment":"mid-Pliocene warm period",
            "experiment_id":"midPliocene-eoi400",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "modelSST-futArcSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA4.2: investigate role of background state in response to Arctic sea ice",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day coupled model SST and future Arctic SIC",
            "experiment_id":"modelSST-futArcSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "modelSST-pdSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA4.1: atmosphere only model present day control with coupled model SST",
            "end_year":"2001",
            "experiment":"Atmosphere time slice present day control with coupled model SST",
            "experiment_id":"modelSST-pdSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "omip1":{
            "activity_id":[
                "OMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Global ocean - sea-ice coupled experiment forced with the Coordinated Ocean - ice Reference Experiments inter-annually varying atmospheric and river data sets for years 1948-2009. Initial ocean tracer fields are based on observations. Simulation length for at least 5 cycles of the 62-year forcing is required. The 5-cycle length is recommended to facilitate intercomparison within the experiment by using a common simulation length, but a longer simulation length is also accepted. For each simulation, set the beginning of the simulation (e.g., 1700 and 1638 for the 5-cycle and 6-cycle simulation, respectively) as the 'base time' of the time axis. Simulations with different simulation lengths by a single model are treated as members of an ensemble. Thus, different 'realization' indexes (e.g., r1, r2, r3, ...) should be used in a global attribute named 'variant_index' (e.g., r1i1p1f1). It is requested that information relevant to understanding the differences in members of an ensemble of simulations is reported in a global attribute named 'variant_info'. This information should also be recorded in the ES-DOC documentation of each experiment performed by a model and be made available via the 'further_info_url' attribute. All Priority=1 OMIP diagnostics (Omon, Oyr) are requested for all cycles of the 62-year forcing to quantify drift. All OMIP diagnostics (Priority=1,2,3) are requested for the last cycle",
            "end_year":"",
            "experiment":"OMIP experiment forced by Large and Yeager (CORE-2, NCEP) atmospheric data set and initialized with observed physical and biogeochemical ocean data",
            "experiment_id":"omip1",
            "min_number_yrs_per_sim":"310",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "OGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "omip1-spunup":{
            "activity_id":[
                "OMIP"
            ],
            "additional_allowed_model_components":[],
            "description":"Same as the omip1 experiment except that it is not initialized with observed climatologies; rather it is initialized with results from at least a 2000-year spin up of the coupled physical-biogeochemical models. The spin up simulations may be made with the classic online or offline approach, or with tracer-acceleration techniques or fast solvers. If an online approach is used, at the end of the 5th cycle of CORE-II forcing, the model's physical fields should be reinitialized to the values at the start of the 3rd cycle in order to avoid long-term drift in those fields and to assure that they will not diverge greatly from physical fields in the omip1 simulation. The spin up also includes radiocarbon to evaluate deep-ocean circulation",
            "end_year":"",
            "experiment":"OMIP experiment forced by Large and Yeager (CORE-2, NCEP) atmospheric data set and initialized from at least a 2000-year spin up of the coupled physical-biogeochemical model",
            "experiment_id":"omip1-spunup",
            "min_number_yrs_per_sim":"310",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "OGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "omip2":{
            "activity_id":[
                "OMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Global ocean - sea-ice coupled experiment forced with the JRA55-do inter-annually varying atmospheric and river data sets for years 1958-2018. Initial ocean tracer fields are based on observations. Simulation length for at least 6 cycles of the 61-year forcing is required. The 6-cycle length is recommended to facilitate intercomparison within the experiment by using a common simulation length, but a longer simulation length is also accepted. In each simulation, set the beginning of the simulation (e.g., 1653 for the 6-cycle simulation) as the 'base time' of the time axis. Simulations with different simulation lengths by a single model are treated as members of an ensemble. Thus, different 'realization' indexes (e.g., r1, r2, r3, ...) should be used in a global attribute named 'variant_index' (e.g., r1i1p1f1). It is requested that information relevant to understanding the differences in members of an ensemble of simulations is reported in a global attribute named 'variant_info'. This information should also be recorded in the ES-DOC documentation of each experiment performed by a model and be made available via the 'further_info_url' attribute. All Priority=1 OMIP diagnostics (Omon, Oyr) are requested for all cycles of the 61-year forcing to quantify drift. All OMIP diagnostics (Priority=1,2,3) are requested for the last cycle",
            "end_year":"",
            "experiment":"OMIP experiment forced by JRA55-do atmospheric data set and initialized with observed physical and biogeochemical ocean data",
            "experiment_id":"omip2",
            "min_number_yrs_per_sim":"366",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "OGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "omip2-spunup":{
            "activity_id":[
                "OMIP"
            ],
            "additional_allowed_model_components":[],
            "description":"Same as the omip2 experiment except that it is not initialized with observed climatologies; rather it is initialized with results from at least a 2000-year spin up of the coupled physical-biogeochemical models. The spin up simulations may be made with the classic online or offline approach, or with tracer-acceleration techniques or fast solvers. If an online approach is used, at the end of the 6th cycle of the JRA55-do forcing, the model's physical fields should be reinitialized to the values at the start of the 4th cycle in order to avoid long-term drift in those fields and to assure that they will not diverge greatly from physical fields in the omip2 simulation. The spin up also includes radiocarbon to evaluate deep-ocean circulation",
            "end_year":"",
            "experiment":"OMIP experiment forced by JRA55-do atmospheric data set and initialized from at least a 2000-year spin up of the coupled physical-biogeochemical model",
            "experiment_id":"omip2-spunup",
            "min_number_yrs_per_sim":"366",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "OGCM",
                "BGC"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pa-futAntSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA2.5: investigate response to Antarctic sea ice in coupled model",
            "end_year":"2001",
            "experiment":"Partially-coupled time slice constrained by future Antarctic SIC",
            "experiment_id":"pa-futAntSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "pa-futAntSIC-ext":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA6.3: investigate decadal and longer timescale response to Antarctic sea ice",
            "end_year":"2099",
            "experiment":"Partially-coupled extended simulation with future Antarctic SIC",
            "experiment_id":"pa-futAntSIC-ext",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pa-futArcSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA2.3: investigate response to Arctic sea ice in coupled model",
            "end_year":"2001",
            "experiment":"Partially-coupled time slice constrained by future Arctic SIC",
            "experiment_id":"pa-futArcSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "pa-futArcSIC-ext":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA6.2: investigate decadal and longer timescale response to Arctic sea ice",
            "end_year":"2099",
            "experiment":"Partially-coupled extended simulation with future Arctic SIC",
            "experiment_id":"pa-futArcSIC-ext",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pa-pdSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA2.1: coupled model present day control constrained by oberved sea ice",
            "end_year":"2001",
            "experiment":"Partially-coupled time slice contrained by present day SIC",
            "experiment_id":"pa-pdSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "pa-pdSIC-ext":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA6.1: centennial coupled model present day control constrained by oberved sea ice",
            "end_year":"2099",
            "experiment":"Partially-coupled extended simulation constrained by present day SIC",
            "experiment_id":"pa-pdSIC-ext",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pa-piAntSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA2.4: investigate response to Antarctic sea ice in coupled model",
            "end_year":"2001",
            "experiment":"Partially-coupled time slice with pre-industrial Antarctic SIC",
            "experiment_id":"pa-piAntSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "pa-piArcSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA2.2: investigate response to Arctic sea ice in coupled model",
            "end_year":"2001",
            "experiment":"Partially-coupled time slice constrained by pre-industrial Arctic SIC",
            "experiment_id":"pa-piArcSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "past1000":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"main forcings: trace gases, volcanoes, solar variability, land use",
            "end_year":"1849",
            "experiment":"last millennium",
            "experiment_id":"past1000",
            "min_number_yrs_per_sim":"1000",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "past1000-solaronly":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Parallel experiment to past1000. Instead of the complete forcing set, only solar (TSI, SSI) forcing is considered",
            "end_year":"1849",
            "experiment":"last millennium experiment using only solar forcing",
            "experiment_id":"past1000-solaronly",
            "min_number_yrs_per_sim":"1000",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "past1000-volconly":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Parallel experiment to past1000. Instead of the complete forcing set, only volcanic forcing is considered",
            "end_year":"1849",
            "experiment":"last millennium experiment using only volcanic forcing",
            "experiment_id":"past1000-volconly",
            "min_number_yrs_per_sim":"1000",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "past2k":{
            "activity_id":[
                "PMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Experiment extending the past1000 simulation back in time to include the first millennium CE. Main forcings: trace gases, volcanoes, solar variability, land-use. past1000 forcings data sets include the first millennium, except for land-use. For the latter, a linear ramp-up to 850CE values is recommended",
            "end_year":"1849",
            "experiment":"last two millennia experiment",
            "experiment_id":"past2k",
            "min_number_yrs_per_sim":"1849",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pdSST-futAntSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.8: investigate response to Antarctic sea ice and its role in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and future Antarctic SIC",
            "experiment_id":"pdSST-futAntSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "pdSST-futArcSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.6: investigate response to Arctic sea ice and its role in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and future Arctic SIC",
            "experiment_id":"pdSST-futArcSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "pdSST-futArcSICSIT":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.10: investigate role of sea ice thickness in response to Arctic sea ice",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and future Arctic SIC and sea ice thickness",
            "experiment_id":"pdSST-futArcSICSIT",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pdSST-futBKSeasSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA3.2: investigate response to sea ice in Barents and Kara Seas",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and future Barents and Kara Seas SIC",
            "experiment_id":"pdSST-futBKSeasSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pdSST-futOkhotskSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA3.1: investigate response to sea ice in Sea of Okhotsk",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and future Sea of Okhotsk SIC",
            "experiment_id":"pdSST-futOkhotskSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pdSST-pdSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.1: atmosphere only model present day control",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and SIC",
            "experiment_id":"pdSST-pdSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "pdSST-pdSICSIT":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.9: atmosphere only model present day control with sea ice thickness",
            "end_year":"2001",
            "experiment":"Atmosphere time slice constrained by present day conditions including sea ice thickness",
            "experiment_id":"pdSST-pdSICSIT",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "pdSST-piAntSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.7: investigate response to Antarctic sea ice and its role in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and pre-industrial Antarctic SIC",
            "experiment_id":"pdSST-piAntSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "pdSST-piArcSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.5: investigate response to Arctic sea ice and its role in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with present day SST and pre-industrial Arctic SIC",
            "experiment_id":"pdSST-piArcSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-2xDMS":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"1850 control with doubled emissions of DMS",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled emissions of DMS",
            "experiment_id":"piClim-2xDMS",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-2xNOx":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"1850 control with doubled emissions of lightning NOx",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled production of NOx due to lightning",
            "experiment_id":"piClim-2xNOx",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-2xVOC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"1850 control with doubled emissions of biogenic VOCs",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled emissions of biogenic VOCs",
            "experiment_id":"piClim-2xVOC",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-2xdust":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"1850 control with doubled dust emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled emissions of dust",
            "experiment_id":"piClim-2xdust",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-2xfire":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"1850 control with doubled emissions of fires",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled emissions from fires",
            "experiment_id":"piClim-2xfire",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-2xss":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"1850 control with doubled sea salt emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with doubled emissions of sea salt",
            "experiment_id":"piClim-2xss",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-4xCO2":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As in piClim-control but with 4xCO2",
            "end_year":"",
            "experiment":"effective radiative forcing by 4xCO2",
            "experiment_id":"piClim-4xCO2",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-BC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 BC emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 black carbon emissions",
            "experiment_id":"piClim-BC",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-CH4":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 CH4 concentrations",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 methane concentrations (including chemistry)",
            "experiment_id":"piClim-CH4",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-HC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 halocarbon concentrations",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 halocarbon concentrations (including chemistry)",
            "experiment_id":"piClim-HC",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-N2O":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 N2O concentrations",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 N2O concentrations (including chemistry)",
            "experiment_id":"piClim-N2O",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-NH3":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 NH3 emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 ammonia emissions",
            "experiment_id":"piClim-NH3",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-NOx":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 NOx emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 NOx emissions",
            "experiment_id":"piClim-NOx",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-NTCF":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 aerosol and ozone precursor emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 NTCF emissions",
            "experiment_id":"piClim-NTCF",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-O3":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 ozone precursor emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 ozone precursor emissions",
            "experiment_id":"piClim-O3",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-OC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 OC emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 organic carbon emissions",
            "experiment_id":"piClim-OC",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-SO2":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 SO2 emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 SO2 emissions",
            "experiment_id":"piClim-SO2",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-VOC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Perturbation from 1850 control using 2014 CO/VOC emissions",
            "end_year":"",
            "experiment":"pre-industrial climatological SSTs and forcing, but with 2014 VOC emissions",
            "experiment_id":"piClim-VOC",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "piClim-aer":{
            "activity_id":[
                "RFMIP",
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As in piClim-control but with with present-day aerosols. Note that this experiment is considered to be tier 1 by RFMIP but tier 2 by AerChemMIP",
            "end_year":"",
            "experiment":"effective radiative forcing by present-day aerosols",
            "experiment_id":"piClim-aer",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-anthro":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"As in piClim-control but with present-day anthropogenic forcing (greenhouse gases, ozone, aerosols and land-use)",
            "end_year":"",
            "experiment":"effective radiative forcing by present day anthropogenic agents",
            "experiment_id":"piClim-anthro",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-control":{
            "activity_id":[
                "RFMIP",
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"30-year atmosphere only integration using preindustrial sea-surface temperature and sea-ice climatology. Interactive vegetation",
            "end_year":"",
            "experiment":"Control simulation providing baseline for evaluating effective radiative forcing (ERF)",
            "experiment_id":"piClim-control",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-ghg":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As in piClim-control but with present-day non-ozone greenhouse gases",
            "end_year":"",
            "experiment":"effective radiative forcing by present-day greenhouse gases",
            "experiment_id":"piClim-ghg",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-histaer":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Time-varying forcing by aerosols. SST and sea ice fixed at preindustrial control. Interactive vegetation",
            "end_year":"2100",
            "experiment":"transient effective radiative forcing by aerosols",
            "experiment_id":"piClim-histaer",
            "min_number_yrs_per_sim":"251",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-histall":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Time-varying forcing. SST and sea ice fixed at preindustrial control. Interactive vegetation",
            "end_year":"2100",
            "experiment":"transient effective radiative forcing",
            "experiment_id":"piClim-histall",
            "min_number_yrs_per_sim":"251",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-histghg":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Time-varying forcing by non-ozone GHGs. SST and sea ice fixed at preindustrial control. Interactive vegetation",
            "end_year":"2100",
            "experiment":"transient effective radiative forcing by greenhouse gases",
            "experiment_id":"piClim-histghg",
            "min_number_yrs_per_sim":"251",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-histnat":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Time-varying forcing from volcanos, solar variability, etc. SST and sea ice fixed at preindustrial control. Interactive vegetation",
            "end_year":"2100",
            "experiment":"transient effective radiative forcing by natural perturbations",
            "experiment_id":"piClim-histnat",
            "min_number_yrs_per_sim":"251",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-lu":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As in piClim-control but with present-day land use",
            "end_year":"",
            "experiment":"effective radiative forcing by present-day land use",
            "experiment_id":"piClim-lu",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piClim-spAer-aer":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. Aerosol forcings",
            "end_year":"",
            "experiment":"effective radiative forcing at present day with specified anthropogenic aerosol optical properties, all forcings",
            "experiment_id":"piClim-spAer-aer",
            "min_number_yrs_per_sim":"",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-spAer-anthro":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. Anthropogenic forcings",
            "end_year":"",
            "experiment":"effective radiative forcing at present day with specified anthropogenic aerosol optical properties, anthropogenic forcings",
            "experiment_id":"piClim-spAer-anthro",
            "min_number_yrs_per_sim":"",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-spAer-histaer":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. Aerosol forcings",
            "end_year":"2014",
            "experiment":"transient effective radiative forcing with specified anthropogenic aerosol optical properties, aerosol forcing",
            "experiment_id":"piClim-spAer-histaer",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piClim-spAer-histall":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Prescribed anthropogenic aerosol optical properties. All anthropogenic and natural forcings",
            "end_year":"2014",
            "experiment":"transient effective radiative forcing with specified anthropogenic aerosol optical properties, all forcings",
            "experiment_id":"piClim-spAer-histall",
            "min_number_yrs_per_sim":"165",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"1850",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piControl":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: control",
            "end_year":"",
            "experiment":"pre-industrial control",
            "experiment_id":"piControl",
            "min_number_yrs_per_sim":"500",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-spinup"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piControl-cmip5":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: control (CMIP5-era pre-industrial forcing)",
            "end_year":"",
            "experiment":"pre-industrial control (CMIP5-era [1850-2005] forcing)",
            "experiment_id":"piControl-cmip5",
            "min_number_yrs_per_sim":"500",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl-spinup-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piControl-spinup":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: spin-up portion of the control",
            "end_year":"",
            "experiment":"pre-industrial control (spin-up)",
            "experiment_id":"piControl-spinup",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piControl-spinup-cmip5":{
            "activity_id":[
                "CMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"DECK: spin-up portion of the control (CMIP5-era pre-industrial forcing)",
            "end_year":"",
            "experiment":"pre-industrial control (spin-up; CMIP5-era [1850-2005] forcing)",
            "experiment_id":"piControl-spinup-cmip5",
            "min_number_yrs_per_sim":"100",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piControl-withism":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Pre-industrial control simulation that includes interactive ice sheets",
            "end_year":"",
            "experiment":"preindustrial control with interactive ice sheet",
            "experiment_id":"piControl-withism",
            "min_number_yrs_per_sim":"500",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM",
                "ISM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piSST":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"An AGCM experiment with monthly-varying SSTs, sea-ice, atmospheric constituents and any other necessary boundary conditions (e.g. vegetation if required) taken from each model's own piControl run (using the 30 years of piControl that are parallel to years 111-140 of its abrupt-4xCO2 run). Dynamic vegetation should be turned off in all the piSST set of experiments",
            "end_year":"",
            "experiment":"experiment forced with pre-industrial SSTs, sea ice and atmospheric constituents",
            "experiment_id":"piSST",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piSST-4xCO2":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Same as piSST but CO2 is quadrupled. The increase in CO2 is seen by both the radiation scheme and vegetation",
            "end_year":"",
            "experiment":"as piSST with radiation and vegetation seeing 4xCO2",
            "experiment_id":"piSST-4xCO2",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piSST-4xCO2-rad":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Same as piSST but CO2 as seen by the radiation scheme is quadrupled",
            "end_year":"",
            "experiment":"as piSST with radiation-only seeing 4xCO2",
            "experiment_id":"piSST-4xCO2-rad",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piSST-4xCO2-solar":{
            "activity_id":[
                "GeoMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Time slice at 1850 (picontrol) for G1ext to examine radiative forcing of abrupt-4xCO2",
            "end_year":"",
            "experiment":"preindustrial control SSTs with quadrupled CO2 and solar reduction",
            "experiment_id":"piSST-4xCO2-solar",
            "min_number_yrs_per_sim":"10",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piSST-pdSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.3: investigate role of SST in polar amplification",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with pre-industrial SST and present day SIC",
            "experiment_id":"piSST-pdSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "piSST-piSIC":{
            "activity_id":[
                "PAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"PA1.2: atmosphere only model pre-industrial control",
            "end_year":"2001",
            "experiment":"Atmosphere time slice with pre-industrial SST and SIC",
            "experiment_id":"piSST-piSIC",
            "min_number_yrs_per_sim":"1",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "amip"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"2000",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "piSST-pxK":{
            "activity_id":[
                "CFMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Same as piSST, but with a spatially and temporally uniform SST anomaly applied on top of the monthly-varying piSST SSTs. The magnitude of the uniform increase is taken from each model's global, climatological annual mean SST change between abrupt-4xCO2 minus piControl (using the mean of years 111-140 of abrupt-4xCO2, and the parallel 30-year section of piControl)",
            "end_year":"",
            "experiment":"as piSST with uniform SST increase with magnitude based on abrupt-4xCO2 response",
            "experiment_id":"piSST-pxK",
            "min_number_yrs_per_sim":"20",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "rad-irf":{
            "activity_id":[
                "RFMIP"
            ],
            "additional_allowed_model_components":[
                ""
            ],
            "description":"Offline radiation calculations",
            "end_year":"",
            "experiment":"offline assessment of radiative transfer parmeterizations in clear skies",
            "experiment_id":"rad-irf",
            "min_number_yrs_per_sim":"",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "RAD"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "rcp26-cmip5":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"future scenario with low radiative forcing by the end of century. Following RCP2.6 global forcing pathway. Concentration-driven (CMIP5-era [2006-2100] forcing)",
            "end_year":"2100 or 2300",
            "experiment":"future projection based on CMIP5-era RCP2.6 scenario (CMIP5-era [2006-2100] forcing)",
            "experiment_id":"rcp26-cmip5",
            "min_number_yrs_per_sim":"95",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2006",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "rcp45-cmip5":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"future scenario with low-medium radiative forcing by the end of century. Following RCP4.5 global forcing pathway. Concentration-driven (CMIP5-era [2006-2100] forcing)",
            "end_year":"2100 or 2300",
            "experiment":"future projection based on CMIP5-era RCP4.5 scenario (CMIP5-era [2006-2100] forcing)",
            "experiment_id":"rcp45-cmip5",
            "min_number_yrs_per_sim":"95",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2006",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "rcp60-cmip5":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"future scenario with medium radiative forcing by the end of century. Following RCP6.0 global forcing pathway. Concentration-driven (CMIP5-era [2006-2100] forcing)",
            "end_year":"2100 or 2300",
            "experiment":"future projection based on CMIP5-era RCP6.0 scenario (CMIP5-era [2006-2100] forcing)",
            "experiment_id":"rcp60-cmip5",
            "min_number_yrs_per_sim":"95",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2006",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "rcp85-cmip5":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"future scenario with high radiative forcing by the end of century. Following RCP8.5 global forcing pathway. Concentration-driven (CMIP5-era [2006-2100] forcing)",
            "end_year":"2100 or 2300",
            "experiment":"future projection based on CMIP5-era RCP8.5 scenario (CMIP5-era [2006-2100] forcing)",
            "experiment_id":"rcp85-cmip5",
            "min_number_yrs_per_sim":"95",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical-cmip5"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2006",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "spinup-1950":{
            "activity_id":[
                "HighResMIP"
            ],
            "additional_allowed_model_components":[
                "AER"
            ],
            "description":"Coupled integration from ocean rest state using recommended HighResMIP protocol spinup, starting from 1950 ocean temperature and salinity analysis EN4, using constant 1950s forcing. At least 30 years to satisfy near surface quasi-equilibrium",
            "end_year":"",
            "experiment":"coupled spinup with fixed 1950s forcings from 1950 initial conditions (with ocean at rest) to provide initial condition for control-1950 and hist-1950",
            "experiment_id":"spinup-1950",
            "min_number_yrs_per_sim":"30",
            "parent_activity_id":[
                "no parent"
            ],
            "parent_experiment_id":[
                "no parent"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp119":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with low radiative forcing throughout reaching about 1.9 W/m2 in 2100 based on SSP1. Concentration-driven",
            "end_year":"2100",
            "experiment":"low-end scenario reaching 1.9 W m-2, based on SSP1",
            "experiment_id":"ssp119",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp126":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with low radiative forcing by the end of century. Following approximately RCP2.6 global forcing pathway but with new forcing based on SSP1. Concentration-driven. As a tier 2 option, this simulation should be extended to year 2300",
            "end_year":"2100 or 2300",
            "experiment":"update of RCP2.6 based on SSP1",
            "experiment_id":"ssp126",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp126-ssp370Lu":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Additional land use policy sensitivity simulation for low radiative forcing scenario, keep all forcings the same as ScenarioMIP SSP1-2.6 (afforestation scenario), but replace land use from SSP3-7 (afforestation) scenario; concentration-driven",
            "end_year":"2100",
            "experiment":"SSP1-2.6 with SSP3-7.0 land use",
            "experiment_id":"ssp126-ssp370Lu",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp245":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with medium radiative forcing by the end of century. Following approximately RCP4.5 global forcing pathway but with new forcing based on SSP2. Concentration-driven",
            "end_year":"2100",
            "experiment":"update of RCP4.5 based on SSP2",
            "experiment_id":"ssp245",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp245-GHG":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Extension of well-mixed GHG-only run under SSP2-4.5. Models with interactive chemistry schemes should either turn off the chemistry or use a preindustrial climatology of stratospheric and tropospheric ozone in their radiation schemes",
            "end_year":"2100",
            "experiment":"well-mixed GHG-only SSP2-4.5 run",
            "experiment_id":"ssp245-GHG",
            "min_number_yrs_per_sim":"80",
            "parent_activity_id":[
                "DAMIP"
            ],
            "parent_experiment_id":[
                "hist-GHG"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2021",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp245-aer":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Extension of aerosol-only run under SSP2-4.5",
            "end_year":"2100",
            "experiment":"aerosol-only SSP2-4.5 run",
            "experiment_id":"ssp245-aer",
            "min_number_yrs_per_sim":"80",
            "parent_activity_id":[
                "DAMIP"
            ],
            "parent_experiment_id":[
                "hist-aer"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2021",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-cov-GHG":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Detection and attribution experiment: well-mixed GHG-only run based on ssp245-covid, with 2-year perturbation to emissions for 2020 and 2021 due to Covid-19 pandemic restrictions. Concentration-driven",
            "end_year":"2024 or 2050",
            "experiment":"2-year Covid-19 emissions blip including well mixed GHG only, based upon ssp245",
            "experiment_id":"ssp245-cov-GHG",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-cov-aer":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Detection and attribution experiment: aerosol-only run based on ssp245-covid, with 2-year perturbation to emissions for 2020 and 2021 due to Covid-19 pandemic restrictions. Concentration-driven",
            "end_year":"2024 or 2050",
            "experiment":"2-year Covid-19 emissions blip including anthropogenic aerosols only, based upon ssp245",
            "experiment_id":"ssp245-cov-aer",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-cov-fossil":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario based on ssp245, but following a path of increased emissions due to a fossil-fuel rebound economic recovery from the Covid-19 pandemic restrictions. Concentration-driven",
            "end_year":"2050",
            "experiment":"2-year Covid-19 emissions blip followed by increased emissions due to a fossil-fuel based recovery, based upon ssp245",
            "experiment_id":"ssp245-cov-fossil",
            "min_number_yrs_per_sim":"31",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-cov-modgreen":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario based on ssp245, but following a path of reduced emissions due to a moderate-green stimulus economic recovery from the Covid-19 pandemic restrictions. Concentration-driven",
            "end_year":"2050",
            "experiment":"2-year Covid-19 emissions blip followed by moderate-green stimulus recovery, based upon ssp245",
            "experiment_id":"ssp245-cov-modgreen",
            "min_number_yrs_per_sim":"31",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-cov-strgreen":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario based on ssp245, but following a path of reduced emissions due to a strong-green stimulus economic recovery from the Covid-19 pandemic restrictions. Concentration-driven",
            "end_year":"2050",
            "experiment":"2-year Covid-19 emissions blip followed by strong-green stimulus recovery, based upon ssp245",
            "experiment_id":"ssp245-cov-strgreen",
            "min_number_yrs_per_sim":"31",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp245-covid":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario based on ssp245, but with 2-year perturbation to emissions for 2020 and 2021 due to Covid-19 pandemic restrictions. Emissions revert to ssp245 after this. Concentration-driven",
            "end_year":"2024 or 2050",
            "experiment":"2-year Covid-19 emissions blip based upon ssp245",
            "experiment_id":"ssp245-covid",
            "min_number_yrs_per_sim":"5",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp245"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2020",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp245-nat":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Extension of natural-only run under SSP2-4.5",
            "end_year":"2100",
            "experiment":"natural-only SSP2-4.5 run",
            "experiment_id":"ssp245-nat",
            "min_number_yrs_per_sim":"80",
            "parent_activity_id":[
                "DAMIP"
            ],
            "parent_experiment_id":[
                "hist-nat"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2021",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp245-stratO3":{
            "activity_id":[
                "DAMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "BGC"
            ],
            "description":"Extension of stratospheric ozone-only run under SSP2-4.5 (ssp245). In models with coupled chemistry, the chemistry scheme should be turned off, and the simulated ensemble mean monthly mean 3D stratospheric ozone concentrations from the SSP2-4.5 simulations should be prescribed. Tropospheric ozone should be fixed at 3D long-term monthly mean piControl values, with a value of 100 ppbv ozone concentration in this piControl climatology used to separate the troposphere from the stratosphere. In models without coupled chemistry the same stratospheric ozone prescribed in SSP2-4.5 should be prescribed. Stratospheric ozone concentrations will be provided by CCMI",
            "end_year":"2100",
            "experiment":"stratospheric ozone-only SSP2-4.5 (ssp245) run",
            "experiment_id":"ssp245-stratO3",
            "min_number_yrs_per_sim":"80",
            "parent_activity_id":[
                "DAMIP"
            ],
            "parent_experiment_id":[
                "hist-stratO3"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2021",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp370":{
            "activity_id":[
                "ScenarioMIP",
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with high radiative forcing by the end of century. Reaches about 7.0 W/m2 by 2100; fills gap in RCP forcing pathways between 6.0 and 8.5 W/m2. Concentration-driven",
            "end_year":"2100",
            "experiment":"gap-filling scenario reaching 7.0 based on SSP3",
            "experiment_id":"ssp370",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370-lowNTCF":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced NTCF emissions",
            "end_year":"2100",
            "experiment":"SSP3-7.0, with low NTCF emissions",
            "experiment_id":"ssp370-lowNTCF",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370-lowNTCFCH4":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"This experiment is identical to ssp370-lowNTCF except that the methane concentrations also follow the \"low\" scenario from SSP3-7.0_lowNTCF",
            "end_year":"2100",
            "experiment":"SSP3-7.0, with low NTCF emissions and methane concentrations",
            "experiment_id":"ssp370-lowNTCFCH4",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp370-ssp126Lu":{
            "activity_id":[
                "LUMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Additional land use policy sensitivity simulation for high radiative forcing scenario, keep all forcings the same as ScenarioMIP SSP3-7 (deforestation scenario), but replace land use from SSP1-2.6 (afforestation) scenario; concentration-driven",
            "end_year":"2100",
            "experiment":"SSP3-7.0 with SSP1-2.6 land use",
            "experiment_id":"ssp370-ssp126Lu",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370SST":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0, with SSTs prescribed from ssp370",
            "end_year":"2100",
            "experiment":"SSP3-7.0, with SSTs prescribed from ssp370",
            "experiment_id":"ssp370SST",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370SST-lowAer":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced aerosol emissions (from ssp370-lowNTCF), prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low aerosol emissions",
            "experiment_id":"ssp370SST-lowAer",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp370SST-lowBC":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced black carbon emissions, prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low black carbon emissions",
            "experiment_id":"ssp370SST-lowBC",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp370SST-lowCH4":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced CH4 concentrations, prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low methane concentrations",
            "experiment_id":"ssp370SST-lowCH4",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370SST-lowNTCF":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced NTCF emissions, prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low NTCF emissions",
            "experiment_id":"ssp370SST-lowNTCF",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370SST-lowNTCFCH4":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"This experiment is identical to ssp370SST-lowNTCF except that the methane concentrations also follow the \"low\" scenario from SSP3-7.0_lowNTCF",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low NTCF emissions and methane concentrations",
            "experiment_id":"ssp370SST-lowNTCFCH4",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "ssp370SST-lowO3":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "BGC"
            ],
            "description":"Future SSP3-7.0 with reduced ozone precursor emissions (from ssp370-lowNTCF), prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with low ozone precursor emissions",
            "experiment_id":"ssp370SST-lowO3",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER",
                "CHEM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp370SST-ssp126Lu":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Future SSP3-7.0 with low land use change (from ssp126), prescribed SSTs",
            "end_year":"2100",
            "experiment":"SSP3-7.0, prescribed SSTs, with SSP1-2.6 land use",
            "experiment_id":"ssp370SST-ssp126Lu",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp370pdSST":{
            "activity_id":[
                "AerChemMIP"
            ],
            "additional_allowed_model_components":[
                "CHEM",
                "BGC"
            ],
            "description":"Experimental set up as ssp370SST except sea surface temperatures (SST) and sea ice concentrations (SICONC) are from a 2005-2014 climatology. Diagnostics are as ssp370SST",
            "end_year":"2100",
            "experiment":"SSP3-7.0, with SSTs prescribed as present day",
            "experiment_id":"ssp370pdSST",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AGCM",
                "AER"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp434":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with low radiative forcing by the end of century. Reaches about 3.4 W/m2 by 2100; fills gap in RCP forcing pathways between 4.5 and 2.6 W/m2. Concentration-driven",
            "end_year":"2100",
            "experiment":"gap-filling scenario reaching 3.4 based on SSP4",
            "experiment_id":"ssp434",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp460":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with medium radiative forcing by the end of century. Following approximately RCP6.0 global forcing pathway but with new forcing based on SSP4. Concentration-driven",
            "end_year":"2100",
            "experiment":"update of RCP6.0 based on SSP4",
            "experiment_id":"ssp460",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp534-over":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"21st century overshoot scenario relative to SSP5_34. Branches from SSP5_85 at 2040 with emissions reduced to zero by 2070 and negative thereafter. This simulation should optionally be extended to year 2300",
            "end_year":"2100 or 2300",
            "experiment":"overshoot of 3.4 W/m**2 branching from ssp585 in 2040",
            "experiment_id":"ssp534-over",
            "min_number_yrs_per_sim":"61",
            "parent_activity_id":[
                "ScenarioMIP"
            ],
            "parent_experiment_id":[
                "ssp585"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2040",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp534-over-bgc":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"This simulation should optionally be extended to year 2300",
            "end_year":"2100 or 2300",
            "experiment":"biogeochemically-coupled version of the RCP3.4-overshoot based on SSP5",
            "experiment_id":"ssp534-over-bgc",
            "min_number_yrs_per_sim":"61",
            "parent_activity_id":[
                "C4MIP"
            ],
            "parent_experiment_id":[
                "ssp585-bgc"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2040",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp585":{
            "activity_id":[
                "ScenarioMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future scenario with high radiative forcing by the end of century. Following approximately RCP8.5 global forcing pathway but with new forcing based on SSP5. Concentration-driven. As a tier 2 option, this simulation should be extended to year 2300",
            "end_year":"2100 or 2300",
            "experiment":"update of RCP8.5 based on SSP5",
            "experiment_id":"ssp585",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "ssp585-bgc":{
            "activity_id":[
                "C4MIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Concentration-driven future scenario simulation, biogeochemically-coupled. This simulation should optionally be extended to year 2300",
            "end_year":"2100 or 2300",
            "experiment":"biogeochemically-coupled version of the RCP8.5 based on SSP5",
            "experiment_id":"ssp585-bgc",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "C4MIP"
            ],
            "parent_experiment_id":[
                "hist-bgc"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "ssp585-withism":{
            "activity_id":[
                "ISMIP6"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Future climate from ScenarioMIP SSP5-8.5 simulation that includes interactive ice sheets. Set up follows the standard SSP5-8.5 experiment",
            "end_year":"2100 or 2300",
            "experiment":"ssp585 with interactive ice sheet",
            "experiment_id":"ssp585-withism",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "ISMIP6"
            ],
            "parent_experiment_id":[
                "historical-withism"
            ],
            "required_model_components":[
                "AOGCM",
                "ISM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "volc-cluster-21C":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Parallel experiment to volc-cluster-ctrl, using restart files from the end of the historical simulation instead of from piControl, and boundary conditions from the 21st century SSP2-4.5 scenario experiment of ScenarioMIP",
            "end_year":"2100",
            "experiment":"volcanic cluster experiment under 21st century SSP2-4.5 scenario",
            "experiment_id":"volc-cluster-21C",
            "min_number_yrs_per_sim":"86",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"2015",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "volc-cluster-ctrl":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Early 19th century cluster of strong tropical volcanic eruptions, including the 1809 event of unknown location, the 1815 Tambora and 1835 Cosigueina eruptions. Experiment initialized from PiControl",
            "end_year":"",
            "experiment":"19th century volcanic cluster initialized from PiControl",
            "experiment_id":"volc-cluster-ctrl",
            "min_number_yrs_per_sim":"50",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "volc-cluster-mill":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Parallel experiment to volc-cluster-ctrl but with initial conditions taken from last millennium simulation to account for the effects of a more realistic history of past natural forcing. All forcings except volcanic kept constant from year AD 1790 on",
            "end_year":"1858",
            "experiment":"19th century volcanic cluster initialized from past1000",
            "experiment_id":"volc-cluster-mill",
            "min_number_yrs_per_sim":"69",
            "parent_activity_id":[
                "PMIP"
            ],
            "parent_experiment_id":[
                "past1000"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"1790",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "volc-long-eq":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Idealized equatorial eruption corresponding to an initial emission of 56.2 Tg of SO2. The eruption magnitude corresponds to recent estimates for the 1815 Tambora eruption (Sigl et al., 2015), the largest historical tropical eruption, which was linked to the so-called \"year without a summer\" in 1816. Experiment initialized from PiControl",
            "end_year":"",
            "experiment":"idealized equatorial volcanic eruption emitting 56.2 Tg SO2",
            "experiment_id":"volc-long-eq",
            "min_number_yrs_per_sim":"20",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "volc-long-hlN":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Idealized Northern Hemisphere high-latitude eruption emitting 28.1 Tg of SO2. Experiment initialized from PiControl",
            "end_year":"",
            "experiment":"idealized Northern Hemisphere high-latitude eruption emitting 28.1 Tg of SO2",
            "experiment_id":"volc-long-hlN",
            "min_number_yrs_per_sim":"20",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"2"
        },
        "volc-long-hlS":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"Idealized Southern Hemisphere high-latitude eruption emitting 28.1 Tg of SO2. Experiment initialized from PiControl",
            "end_year":"",
            "experiment":"Idealized Southern Hemisphere high-latitude eruption emitting 28.1 Tg of SO2",
            "experiment_id":"volc-long-hlS",
            "min_number_yrs_per_sim":"20",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "volc-pinatubo-full":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"1991 Pinatubo forcing as used in the CMIP6 historical simulations. Requires special diagnostics of radiative and latent heating rates. A large number of ensemble members is required to address internal atmospheric variability",
            "end_year":"",
            "experiment":"Pinatubo experiment",
            "experiment_id":"volc-pinatubo-full",
            "min_number_yrs_per_sim":"3",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "volc-pinatubo-slab":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As volc-pinatubo-full, but with a slab ocean",
            "end_year":"",
            "experiment":"Pinatubo experiment with slab ocean",
            "experiment_id":"volc-pinatubo-slab",
            "min_number_yrs_per_sim":"3",
            "parent_activity_id":[
                "VolMIP"
            ],
            "parent_experiment_id":[
                "control-slab"
            ],
            "required_model_components":[
                "AGCM",
                "SLAB"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        },
        "volc-pinatubo-strat":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As volc-pinatubo-full, but with prescribed perturbation to the total (LW+SW) radiative heating rates",
            "end_year":"",
            "experiment":"Pinatubo experiment with partial radiative forcing, includes only stratospheric warming",
            "experiment_id":"volc-pinatubo-strat",
            "min_number_yrs_per_sim":"3",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "volc-pinatubo-surf":{
            "activity_id":[
                "VolMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM",
                "BGC"
            ],
            "description":"As volc-pinatubo-full, but with prescribed perturbation to the shortwave flux to mimic the attenuation of solar radiation by volcanic aerosols",
            "end_year":"",
            "experiment":"Pinatubo experiment with partial radiative forcing, solar radiation scattering only",
            "experiment_id":"volc-pinatubo-surf",
            "min_number_yrs_per_sim":"3",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "piControl"
            ],
            "required_model_components":[
                "AOGCM"
            ],
            "start_year":"",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"1"
        },
        "yr2010CO2":{
            "activity_id":[
                "CDRMIP"
            ],
            "additional_allowed_model_components":[
                "AER",
                "CHEM"
            ],
            "description":"Branch from beginning of year 2010 of the historical simulation with CO2 concentration and all other forcing held fixed at 2010 level (part of the CDR-yr2010-pulse experiment to diagnose CO2 emissions)",
            "end_year":"2115",
            "experiment":"concentration-driven fixed 2010 forcing",
            "experiment_id":"yr2010CO2",
            "min_number_yrs_per_sim":"106",
            "parent_activity_id":[
                "CMIP"
            ],
            "parent_experiment_id":[
                "historical"
            ],
            "required_model_components":[
                "AOGCM",
                "BGC"
            ],
            "start_year":"2010",
            "sub_experiment_id":[
                "none"
            ],
            "tier":"3"
        }
    },
    "version_metadata":{
        "CV_collection_modified":"Thu Sep  4 16:01:22 2025 -0700",
        "CV_collection_version":"6.2.60.0",
        "author":"Paul J. Durack <durack1@llnl.gov>",
        "experiment_id_CV_modified":"Tue Dec 15 12:25:59 2020 -0800",
        "experiment_id_CV_note":"Revise experiment_id historical parent experiments",
        "institution_id":"PCMDI",
        "previous_commit":"6d8517ab7efac022ccb6bf847bf412683d524ee7",
        "specs_doc":"v6.2.7 (10th September 2018; https://goo.gl/v1drZl)"
    }
}