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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:
ANDRAS: we have to check, if this level of information is needed in this overview or that is enough in the documentation. Maybe one sentence about these "runs" is sufficient here.
GL: Agree with Andras. This paragraph burdens the overview.
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 The erroneous v1-simulation has been unpublished from the ESGF.For the CNRM-CM5 forced runs "v2" is a new simulation replacing the old now with input data taken from pressure levels instead of model levels.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".
The data are produced by the participating institutes of the EURO-CORDEX, Med-CORDEX projects and several national contributions to CORDEX. ANDRAS: this sentence might be extended in the view of the non-European data. GL: "several national contributions" is not enough ? I don't know if the non-European domains were part of similar consortiums as EURO-CORDEX or Med-CORDEX. I let Manuel and Grisha on this. Jose, would you check this, please?
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.
- Select the required time period (which depends on the experiment). ANDRAS: why this is optional? GL: Not optional sorry, corrected.
- The search interface will adapt the other selection fields according to the available data (e.g., which models provides the variable you aim for, how many ensemble are available, etc.)
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