This catalogue entry provides daily and monthly Regional Climate Model (RCM) data on single levels from a number of experiments, models, members and time periods computed over Europe and in the framework of the Coordinated Regional Climate Downscaling Experiment (CORDEX). The term "single levels" is used to express that the variables are computed at one vertical level which can be surface (or a level close to the surface) or a dedicated pressure level in the atmosphere. Multiple vertical levels are excluded from this catalogue entry.
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Additionally, the uncertainty related to internal variability of the climate system is sampled by running several simulations with the same RCM-GCM combination. On the forms, these are indexed as separate ensemble members (the naming convention for ensemble members is available in the documentation). For each GCM, 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. More details behind these sequential ensemble numbers will be available in the detailed documentation.
On a general level in the CDS form for the RCM simulations “v” enumerates runs and not model versions. Runs numbers different from “v1” means new simulations relative to the first “v1” one. It might not mean a new version.
- For the EC-EARTH and HadGEM2-ES forced HIRHAM RCM simulation “v2” is a new simulation where proper GHG concentrations changing with time are used as a contrast to “v1” that erroneously used the constant control level throughout the simulation. Therefore users should use "v2".
- For NorESM forced HIRAM RCM “v2” run includes also an error in the vertical interpolation when preparing the boundary files also exists. Therefore users should use "v3".
- For the MOHC-HadGEM2-ES forced RACMO simulation "v2" is a new simulation where a big error in SST-remapping from the HadGEM-grid to the RCM-grid in "v1" was corrected. The erroneous v1-simulation has been unpublished from the ESGF.
- For the CNRM-CM5 forced runs "v2" is a new simulation replacing the old now with input data taken from pressure levels instead of model levels. The originally provided model level fields from CNRM were wrong.
- Two MPI-driven scenario runs were rerun in 2016 as there had been problems with a restart file and as there was an error in the snow diagnostics in the original run. The reruns were labelled "v1a".
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More details about the product are given in the Documentation section.
Horizontal coverage | From 27°N to 72°N and from 22°W to 45°E (grid projection may differ among RCMs) |
Horizontal resolution | 0.11° x 0.11° |
Temporal coverage | 01/1950 - 12/2100 (shorter for some experiments) |
Temporal resolution | Daily |
Update frequency | Regular quarterly updates |
File format | NetCDF 4, Climate and Forecast (CF) Metadata Convention v1.6 |
Data type | Grid |
| MAIN VARIABLES | ||
|---|---|---|
| Name | Units | Description |
| 10m Wind Speed | m s-1 | The magnitude of the two-dimensional horizontal air velocity. The data represents the mean over the aggregation period near to the surface. |
| 2m air temperature | K | The ambient air temperature. The data represents the mean over the aggregation period near to the surface. |
| Mean precipitation flux | kg m-2 s-1 | The deposition of water to the Earth's surface in the form of rain, snow, ice or hail. The precipition flux is the mass of water per unit area and time. The data represents the mean over the aggregation period. |
| Mean sea level pressure | Pa | The air pressure at sea level. In regions where the Earth's surface is above sea level the surface pressure is used to compute the air pressure that would exist at sea level directly below given a constant air temperature from the surface to the sea level point. The data represents the mean over the aggregation period. |
| Near surface relative humidity | % | Relative humidity is the percentage ratio of the water vapour mass to the water vapour mass at the saturation point given the temperature at that location. The data represents the mean over the aggregation period near to the surface. |
| Surface solar radiation downwards | W m-2 | The downward shortwave radiative flux of energy per unit area. The data represents the mean over the aggregation period at the surface. |