{
    "alb": {
        "description": "surface albedo",
        "derived_from": ["rsdscs", "rsuscs"],
        "units": "[1]"
    },
    "amoc": {
        "description": "Atlantic meriodinal overturning circulation",
        "derived_from": ["msftmz"]
    },
    "asr": {
        "description": "absorbed shortwave radiation",
        "derived_from": ["rsdt", "rsut"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "chlora": {
        "description": "surface chlorophyll concentration",
        "derived_from": ["chldiatos", "chlmiscos"],
        "units": "[kg m-3]"
    },
    "clhmtisccp": {
        "description": "ISCCP high level medium-thickness cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "clhtkisccp": {
        "description": "ISCCP high level thick cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "cllmtisccp": {
        "description": "ISCCP low level medium-thickness cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "clltkisccp": {
        "description": "ISCCP low level thick cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "clmmtisccp": {
        "description": "ISCCP middle level medium-thickness cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "clmtkisccp": {
        "description": "ISCCP middle level thick cloud area fraction",
        "derived_from": ["clisccp"]
    },
    "co2s": {
        "description": "mole fraction of CO2 at surface",
        "derived_from": ["co2", "ps"],
        "units": "[1e-06]"
    },
    "ctotal": {
        "description": "total ecosystem carbon storage",
        "derived_from": ["cVeg", "cSoil"],
        "units": "[kg m-2]"
    },
    "et": {
        "description": "evapotranspiration",
        "derived_from": ["hfls"],
        "units": "[mm day-1]"
    },
    "hfns": {
        "description": "surface net heat flux",
        "derived_from": ["hfls", "hfss"],
        "units": "[W m-2]"
    },
    "hurs": {
        "description": "relative humidity",
        "derived_from": ["tdps", "tas"],
        "units": "[%]"
    },
    "lvp": {
        "description": "Latent Heat Release from Precipitation",
        "derived_from": ["hfls", "pr", "evspsbl"]
    },
    "lwcre": {
        "description": "longwave cloud radiative effect",
        "derived_from": ["rlut", "rlutcs"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "lwp": {
        "description": "liquid water path",
        "derived_from": ["clwvi", "clivi"],
        "units": "[kg m-2]"
    },
    "netcre": {
        "description": "net cloud radiative effect as sum of longwave and shortwave cloud radiative effects",
        "derived_from": ["rlut", "rlutcs", "rsut", "rsutcs"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "ohc": {
        "description": "ocean heat content",
        "derived_from": ["thetao", "volcello"]
    },
    "qep": {
        "description": "net moisture flux into atmosphere",
        "derived_from": ["evspsbl", "pr"],
        "units": "[kg m-2 s-1]",
        "positive": "up"
    },
    "rlns": {
        "description": "surface net downward longwave radiation",
        "derived_from": ["rlds", "rlus"],
        "units": "[W m-2]"
    },
    "rlnst": {
        "description": "Net Atmospheric Longwave Cooling to surface and outer space",
        "derived_from": ["rlds", "rlus", "rlut"],
        "units": "[W m-2]"
    },
    "rlnstcs": {
        "description": "Net Atmospheric Longwave Cooling to surface and outer space assuming clear sky",
        "derived_from": ["rldscs", "rlus", "rlutcs"],
        "units": "[W m-2]"
    },
    "rlntcs": {
        "description": "TOA (Top of Atmosphere) net downward longwave radiation assuming clear sky",
        "derived_from": ["rlutcs"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "rlus": {
        "description": "upwelling longwave flux from downwelling and net",
        "derived_from": ["rlds", "rlns"],
        "units": "[W m-2]",
        "positive": "up"
    },
    "rsns": {
        "description": "surface net downward shortwave radiation",
        "derived_from": ["rsds", "rsus"],
        "units": "[W m-2]"
    },
    "rsnst": {
        "description": "Heating from Shortwave Absorption",
        "derived_from": ["rsds", "rsdt", "rsus", "rsut"],
        "units": "[W m-2]"
    },
    "rsnstcs": {
        "description": "Heating from Shortwave Absorption assuming clear sky",
        "derived_from": ["rsdscs", "rsdt", "rsuscs", "rsutcs"],
        "units": "[W m-2]"
    },
    "rsnstcsnorm": {
        "description": "Heating from Shortwave Absorption assuming clear sky normalized by the incoming shortwave flux at the top of the atmosphere",
        "derived_from": ["rsdscs", "rsdt", "rsuscs", "rsutcs"],
        "units": "[percent]"
    },
    "rsnt": {
        "description": "TOA (Top of Atmosphere) net downward shortwave radiation",
        "derived_from": ["rsdt", "rsut"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "rsntcs": {
        "description": "TOA (Top of Atmosphere) net downward shortwave radiation assuming clear sky",
        "derived_from": ["rsdt", "rsutcs"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "rsus": {
        "description": "upwelling shortwave flux from downwelling and net",
        "derived_from": ["rsds", "rsns"],
        "units": "[W m-2]",
        "positive": "up"
    },
    "rtnt": {
        "description": "TOA (Top of Atmosphere) net downward total radiation",
        "derived_from": ["rsdt", "rsut", "rlut"],
        "units": "[W m-2]"
    },
    "sfcwind": {
        "description": "near-surface wind speed derived from eastward and northward components",
        "derived_from": ["uas", "vas"],
        "units": "[m s-1]"
    },
    "siextent": {
        "description": "sea ice extent",
        "derived_from": ["siconca"],
        "units": "[m2]"
    },
    "sispeed": {
        "description": "sea ice speed from velocity components siu and siv",
        "derived_from": ["siu", "siv"],
        "units": "[m s-1]"
    },
    "sithick": {
        "description": "sea ice thickness from volume and concentration",
        "derived_from": ["sit", "sic"]
    },
    "sm": {
        "description": "soil moisture",
        "derived_from": ["mrsos"],
        "units": "[m3 m-3]"
    },
    "soz": {
        "description": "stratospheric column ozone",
        "derived_from": ["o3"]
    },
    "swcre": {
        "description": "shortwave cloud radiative effect",
        "derived_from": ["rsut", "rsutcs"],
        "units": "[W m-2]",
        "positive": "down"
    },
    "toz": {
        "description": "total column ozone",
        "derived_from": ["o3", "ps"],
        "units": "[m]"
    },
    "troz": {
        "description": "tropospheric column ozone",
        "derived_from": ["o3", "ps"]
    },
    "uajet": {
        "description": "latitude of maximum meridional wind speed",
        "derived_from": ["ua"],
        "units": "[degrees_north]"
    },
    "vegfrac": {
        "description": "vegetation fraction from bare soil fraction",
        "derived_from": ["baresoilFrac", "residualFrac", "sftlf"]
    },
    "xch4": {
        "description": "the column-averaged atmospheric CH4 [1e-9]",
        "derived_from": ["ch4", "hus", "zg", "ps"],
        "units": "[1]"
    },
    "xco2": {
        "description": "the column-averaged atmospheric CO2 [1e-6]",
        "derived_from": ["co2", "hus", "zg", "ps"],
        "units": "[1]"
    }

}