This catalogue entry provides daily and monthly global climate projections on single levels data from a large number of experiments, models , members and time periods computed in the framework of sixth phase of the Coupled Model Intercomparison Project (CMIP6).
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- Historical experiments which cover the period where modern climate observations exist. These experiments show how the GCMs performs for the past climate and can be used as a reference period for comparison with scenario runs for the future. The period covered is typically 1850-2005.
- Ensemble of climate Climate projection experiments following the combined pathways of Shared Socioeconomic Pathway (SSP) and Representative Concentration Pathway (RCP). The SSP scenarios provide different pathways of the future climate forcing. The period covered is typically 2006-2100, some extended RCP experimental data is available from 2100-2300.
In CMIP6, the same experiments were run using different GCMs. In addition, for each model, the same experiment was repeatedly done using slightly different conditions (like initial conditions or different physical parameterisations for instance) producing in that way an ensemble of experiments closely related. this catalogue entry the users will be able to select vertical levels for the 3-dimensional variables and spatial and temporal subsetting of all the available data. This is a new feature of the global climate projection dataset, which relies on compute processes run simultaneously in the ESGF nodes, where the data are originally located.
The data are produced by the participating institutes of the CMIP6 project.
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| MAIN VARIABLES | |||||
|---|---|---|---|---|---|
| Name | Units | Description | |||
| 10m u component of wind | m s-1 | Magnitude of the eastward component of the two-dimensional horizontal air velocity near the surface. | |||
| 10m v component of wind | m s-1 | Magnitude of the northward component of the two-dimensional horizontal air velocity near the surface. | |||
| 10m wind_speed | m s-1 | Magnitude of the two-dimensional horizontal air velocity near thesurface. | |||
| 2m temperature | K | Temperature of the air near the surface. | |||
| Eastward turbulent surface stress | N s m-2 | Eastward component of the horizontal drag exerted by the atmosphere on the surface through turbulent processes. | |||
| Evaporation | kg m-2 s-1 | Evaporation rate. It includes conversion to vapor phase from both the liquid and solid phase, i.e., includes sublimation. | |||
| Maximum 2m temperature in the last 24 hours | KDaily maximum near-surface air temperature. | ||||
| Mean precipitation flux | kg m-2 s-1 | Amount of water per unit area and time. | |||
| Mean sea level pressure | Pa | Time average of the air pressure at sea level. | |||
| Minimum 2m temperature in the last 24 hours | K | Daily minimum near-surface air temperature. | |||
| Near surface relative humidity | % | Amount of moisture in the air near the surface divided by the maximum amount of moisture that could exist in the air at a specific temperature and location. | |||
| Near surface specific humidity | Dimensionless | Amount of moisture in the air near the surface divided by amount of air plus moist at that location. | |||
| Northward turbulent surface stress | N s m-2 | Northward component of the horizontal drag exerted by the atmosphere on the surface through turbulent processes. | |||
| Runoff | kg m-2 s-1 | Amount per unit area of surface and subsurface liquid water which drains from land. | |||
| Sea ice fraction | Dimensionless | Area of the sea surface occupied by sea ice. | |||
| Sea ice plus snow amount | kg m-2 | Mass per unit area of sea ice plus snow in the ocean portion of the grid cell averaged over the entire ocean portion, including the ice-free fraction. Reported as 0.0 in regions free of sea ice. | |||
| Sea ice surface temperature | K | Temperature that exists at the interface of tea sea - ice and the overlying medium which may be air or snow. | Sea ice thickness | m | Vertical extent of ocean sea ice. |
| Sea surface height above geoid | m | Vertical distance between the actual sea surface and a surface of constant geopotential with which mean sea level would coincide if the ocean were at rest. | |||
| Sea surface temperature | K | Temperature of sea water near the surface. | |||
| Skin temperature | K | Temperature at the interface (not the bulk temperature of the medium above or below) between air and sea for open-sea regions. | |||
| Snow depth over sea ice | K | Mean thickness of snow in the ocean portion of the grid cell (averaging over the entire ocean portion, including the snow-free ocean fraction). Reported as 0.0 in regions free of snow-covered sea ice. | |||
| Snowfall | kg m-2 s-1 | Mass of water in the form of snow precipitating per unit area. | |||
| Soil moisture content | kg m-2 | Vertical sum per unit area from the surface down to the bottom of the soil model of water in all phases contained in soil. | |||
| Surface latent heat flux | W m-2 | Flux per unit area of heat between the surface and the air on account of evaporation including sublimation. Positive when directed upward (negative downward). | |||
| Surface pressure | Pa | Pressure of air at the lower boundary of the atmopshere | |||
| Surface sensible heat flux | W m-2 | Flux per unit area of heat between the surface and the air by motion of air only. Positive when directed upward (negative downward).Surface snow amount | kg m-2 | Snow amount on the ground, excluding that on the plant or vegetation canopy, per unit area. | |
| Surface solar radiation downwards | W m-2 | Radiative shortwave flux of energy downward at the surface. | |||
| Surface thermal radiation downwards | W m-2 | Radiation inciding on the surface from the above per unit area. | |||
| Surface upwelling longwave radiation | W m-2 | Longwave radiation from the surface per unit area. | |||
| Surface upwelling shortwave radiation | W m-2 | Shortwave radiation from the surface per unit area. | |||
| TOA incident solar radiation | W m-2 | Incident solar radiation at the top of atmosphere | TOA outgoing clear-sky longwave radiation | W m-2 | Longwave radiation from the top of the atmosphere to space per unit area assuming clear-sky conditions |
| TOA outgoing clear-sky shortwave radiation | W m-2 | Shortwave radiation from the top of the atmosphere to space per unit area assuming clear-sky conditions | |||
| TOA outgoing longwave radiation | W m-2 | Longwave radiation from the top of the atmosphere to space per unit area. | |||
| TOA outgoing shortwave radiation | W m-2 | Shortwave radiation from the top of the atmosphere to space per unit area. | |||
| Total cloud cover | Dimensionless | Total refers to the whole atmosphere column, as seen from the surface or the top of the atmosphere. Cloud cover refers to fraction of horizontal area occupied by clouds. | |||