This catalogue entry provides Regional Climate Model (RCM) data on single levels from a number of experiments, models, domains, resolutions, ensemble members, time frequencies and periods computed over several regional domains and all over the World in the framework of the Coordinated Regional Climate Downscaling Experiment (CORDEX). The term "single levels" is used to express that the variables are 2D-matrices computed on 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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The term "region" in the CDS form refers to the different regional domains, which are as follows:
- EUR: European domain from 27°N to 72°N and from 22°W to 45°E. The horizontal resolution for this domain is 0.11°x011° x 0.11° (EUR-11).
- MED: Mediterranean domain from 25°N to 52°N and from 21°W to 50°E. The horizontal resolutions for this domain are 0.11°x011° x 0.11° (MED-11) and 0.44°x044° x 0.44° (MED-44).
- NAM: North-American domain from 12°N to 59°N and from 171°W to 24°W. The horizontal resolutions for this domain are 0.22°x022° x 0.22° (NAM-22) and 0.44°x044° x 0.44° (NAM-44).
- ARC: Arctic domain from 46°N to 90°N and from 180°W to 180°E. The horizontal resolutions for this domain are 0.22°x022° x 0.22° (ARC-22) and 0.44°x044° x 0.44° (ARC-44).
- AFR: Africa domain from 45°S to 42°N and from 24°W to 60°E. The horizontal resolutions for this domain are 0.22° x 0.22° (AFR-22) and 0.44° x 0.44° (AFR-44).
- SAM: South America domain from 52°S to 19°N and from 105°W to 17°W. The horizontal resolutions for this domain are 0.20° x 0.20° (SAM-20),0.22° x 0.22° (SAM-22) and 0.44° x 0.44° (SAM-44).
Additional details on each CORDEX geographical domain are available at https://cordex.org/domains/.
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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 is 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:
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All known issues about the CORDEX data are documented through the ES-DOC Errata Service : https://errata.es-doc.org/.
The data are produced by the participating institutes institutes and modelling centres participating in the different CORDEX domains with partial support from different international and national contributions (including support from COPERNICUS for some of the EURO-CORDEX , Med-CORDEX projects and several national contributions to CORDEX.runs and for helping in the data curation and ESGF archiving process in some domains).
Recommended search procedure:
- Select the CORDEX region of interest
- Select the spatial resolution of interest
- Select the CORDEX experiment (e.g., future scenario) of interest
- Select the required variable(s) for your analysis.
- (Optional) Select the required time period (which depends on the experiment).
- The search interface will adapt the other selection fields according to the available data (e.g., which models provides the variable you wantaim for, how many ensemble are available, etc.)
| DATA DESCRIPTION | |
|---|---|
| Data type | Gridded |
| Horizontal coverage | Depends on the regional domain (grid projection may differ among RCMs) |
| Horizontal resolution | 0.11°x011° x 0.11°, 0.22°x020°x 0.20°, 0.22° x 0.22° or 0.44°x044° x 0.44° depending on the region. |
| Vertical resolution | Variables are provided in one single level (which may differ among variables) |
| Temporal coverage | evaluation runs are from 1989 to 2008 historical runs are from 1951 to 2005 scenario runs are from 2006 to 2100 |
| Temporal resolution | 3h, 6h, daily, monthly and seasonal |
| File format | NetCDF4 |
| Conventions | Climate and Forecast (CF) Metadata Convention v1.6 |
| Versions | Latest version of the data is provided. |
| Update frequency | Regular quarterly updates |
| VARIABLES | |||
| Name | Short name | Units | Description |
|---|---|---|---|
| 2m temperature | tas | K | The temperature of the air near the surface (or ambient temperature). The data represents the mean over the aggregation period at 2m above the surface. |
| 200hPa temperature | ta200 | K | The temperature of the air at 200hPa. The data represents the mean over the aggregation period at 200hPa |
| pressure level. | |||
| Minimum 2m temperature in the last 24 hours | tasmin | K | The minimum temperature of the air near the surface. The data represents the daily minimum |
| at 2m above the surface. | |||
| Maximum 2m temperature in the last 24 hours | tasmax | K | The maximum temperature of the air near the surface. The data represents the daily maximum |
| at 2m above the surface. | |||
| Mean precipitation flux | pr | kg.m-2.s-1 | The deposition of water to the Earth's surface in the form of rain, snow, ice or hail. The precipitation flux is the mass of water per unit area and time. The data represents the mean over the aggregation period. |
| Mean evaporation flux | evspsbl | kg.m-2.s-1 | The mass of surface and sub-surface liquid water per unit area ant time, which evaporates from land. The data includes conversion to vapour phase from both the liquid and solid phase, i.e., includes sublimation, and represents the mean over the aggregation period. |
| 2m surface relative humidity | hurs | % | The 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 at 2m above the surface. | |||
| 2m surface specific humidity | huss | Dimensionless | The amount of moisture in the air at 2m above the surface divided by the amount of air plus moisture at that location. The data represents the mean over the aggregation period at 2m above the surface. |
| Surface pressure | ps | Pa | The air pressure at the lower boundary of the atmosphere. The data represents the mean over the aggregation period. |
| Mean sea level pressure | psl | 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. |
| 10m Wind Speed | sfcWind | m.s-1 | The magnitude of the two-dimensional horizontal air velocity. The data represents the mean over the aggregation period at 10m above the surface. |
| Surface solar radiation downwards | rsds | 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. |
| Surface thermal radiation downward | rlds | W.m-2 | The downward longwave radiative flux of energy inciding on the surface from the above per unit area. The data represents the mean over the aggregation period. |
| Surface upwelling shortwave radiation | rsus | W.m-2 | The upward shortwave radiative flux of energy from the surface per unit area. The data represents the mean over the aggregation period at the surface. |
| Total cloud cover | clt | 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. The data represents the mean over the aggregation period. |
| 500hPa geopotential | zg500 | m | The gravitational potential energy per unit mass normalized by the standard gravity at 500hPa at the same latitude. The data represents the mean over the aggregation period at 500hPa |
| pressure level. | |||
| 10m u-component of wind | uas | m.s-1 | The magnitude of the eastward component of the wind. The data represents the mean over the aggregation period at 10m above the surface. |
| 10m v-component of wind | vas | m.s-1 | The magnitude of the northward component of the wind. The data represents the mean over the aggregation period at 10m above the surface. |
| 200hPa u-component of the wind | ua200 | m.s-1 | The magnitude of the eastward component of the wind. The data represents the mean over the aggregation period at 200hPa above the surface. |
| 200hPa v-component of the wind | va200 | m.s-1 | The magnitude of the northward component of the wind. The data represents the mean over the aggregation period at 200hPa |
| pressure level. | |||
| 850hPa U-component of the wind | ua850 | m.s-1 | The magnitude of the eastward component of the wind. The data represents the mean over the aggregation period at 850hPa |
| pressure level. | |||
| 850hPa V-component of the wind | va850 | m.s-1 | The magnitude of the northward component of the wind. The data represents the mean over the aggregation period at 850hPa |
| pressure level. | |||
| Total run-off flux | mrro | kg.m-2.s-1 | The mass of surface and sub-surface liquid water per unit area and time, which drains from land. The data represents the mean over the aggregation period. |
| Mean evaporation flux | evspsbl | kg.m-2.s-1 | The mass of surface and sub-surface liquid water per unit area ant time, which evaporates from land. The data includes conversion to |
vapour phase from both the liquid and solid phase, i.e., includes sublimation, and |
represents the mean over the aggregation period. | ||
| Land area fraction | sftlf | % |
| The fraction (in percentage) of |
| grid cell occupied by land |
| surface. The |
| data is time-independent. | ||
| Orography | orog | m |
| The height above the geoid (being 0.0 over the ocean). The data is time-independent. |
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