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- The first category, labelled realization_index (referred to with letter r), performs experiments which differ only in random perturbations of the initial conditions of the experiment. Comparing different realizations allow estimation of the internal variability of the model climate.
- The second category, labelled initialization_index (referred to with letter i), refers to variation in initialisation parameters. Comparing differently initialised output provides an estimate of how sensitive the model is to initial conditions.
- The third category, labelled physics_index (referred to with letter p), refers to variations in the way in which sub-grid scale processes are represented. Comparing different simulations in this category provides an estimate of the structural uncertainty associated with choices in the model design.
- The fourth category labelled forcing_index (referred to with letter f) is used to distinguish runs of a single CMIP6 experiment, but with different forcings applied.
Parameter listings
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I AM WONDERING, IF THE ESGF LONG NAMES CAN BE ALSO
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INSERTED INTO THE TABLE? I THINK, IT WOULD BE USEFUL TO AVOID ANY CONFUSION!
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CDS parameter name | ESGF variable id | Units | 2m temperature | tas | Kelvin | Maximum 2m temperature in the last 24 hours | tasmax | Kelvin | Minimum 2m temperature in the last 24 hours | tasmin | Kelvin | | Skin temperature | ts | Kelvin | | Mean sea level pressure | psl | Pa | | Surface pressure | ps | Pa | | 10m u component of wind | uas | m s-1 | | 10m v component of wind | vas | m s-1 | | 10m wind speed | sfcWind | m s-1 | | 2m relative humidity | hurs | 1 | | 2m specific humidity | huss | 1 | | Mean precipitation flux | pr | kg m-2 s-1 | | Snowfall | prsn | kg m-2 s-1 | | Evaporation | evspsbl | kg m-2 s-1 | | Eastward turbulent surface stress | tauu | Pa | | Northward turbulent surface stress | tauv | Pa | | Surface latent heat flux | hfls | W m-2 | | Surface sensible heat flux | hfss | W m-2 | Surface thermal radiation downwards | rlds | W m-2 | Surface upwelling longwave radiation | rlus | W m-2 | Surface solar radiation downwards | rsds | W m-2 | Surface upwelling shortwave radiation | rsus | W m-2 | TOA incident solar radiation | rsdt | W m-2 | | TOA outgoing shortwave radiation | rsut | W m-2 | | TOA outgoing longwave radiation | rlut | W m-2 | | Total cloud cover | clt | 1 | | Air temperature | ta | K | | U-component of wind | ua | m s-1 | | V-component of wind | va | m s-1 | | Relative humidity | hur | 1 | | Specific humidity | hus | 1 | | Geopotential height | zg | m | | Surface snow amount | snw | kg m-2 | | Snow depth? | snd | m | | Runoff | mrro | kg m-2 s-1 | | Soil moisture content | mrsos | kg m-2 | | Sea-ice are percentage? | siconc | 1 | | Sea ice thickness | sithick | m | | Sea ice plus snow amount | simass | kg m-2 | | Sea ice surface temperature | sitemptop | K | | Sea surface temperature | tos | K | | Sea surface salinity? | sos | 1e-3 | | Sea surface height above geoid | zos | m | | Grid-cell area for atmospheric grid variables?? | areacello | m2 | | Sea area percentage? | sftof | % | | Grid-cell area for ocean variables?? | areacella | m2 | | Capacity of soil to store water? | mrsofc | kg m-2 | | Percentage of grid cell occupied by land (including lakes)? | sftlf | % | | Land ice area percentage? | sftgif | 1 | | Orography | orog | m |
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