CDO

Hello,

I am trying to regrid COSMO and WRF output for Ireland into the CORDEX domain for climate model validation of wind fields.
I created the target grid according to CORDEX domain (rotRegGrid.csv). When I test the targetgrid and regrid to CORDEX domain file (cordex.nc) with

cdo remapbil,rotRegGrid.csv cordex.nc test.nc

the input and output files are exactly the same, as expected, so the target grid definition seems to be ok.

However, when I now try to regrid WRF (wrf_output.nc) and COSMO output (cosmo_output.nc), it does not map Ireland correctly to the new grid and maps it to the wrong location (see ncview_cosmo_output_regridded.png). I suspect there might be something wrong with the information in the source grids.

For regridding I used the following:

cdo remapbil,rotRegGrid.csv cosmoClm_output.nc cosmo_output_regridded.nc

COSMO and WRF input files show the same behaviour.

Any help/input/idea is greatly appreciated!

Thanks a lot
Tatjana

• rotRegGrid.csv: Target Grid for the valdiation domain, Cordex Domain, created from information in cordex_out.nc
• cordex_out.nc: Cordex output (validation domain)
• cosmoClm_output.nc: COSMO-CLM output to be regridded to Cordex Domain
• wrf.nc: WRF output to be regridded to Cordex Domain
• ncview_cordex_output.png: shows cordex domain
• cosmo_output_regridded.nc: regridded COSMO output
• ncview_cosmo_output_regridded.png: shows Ireland mapped to the wrong domain after regridding