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CDO = Climate Data Operators

See CDO Homepage at MPI.

Some Usefull Commands

Generate Land Sea Mask (Sea=0, Land=1)

cdo -f nc -gtc,0 -remapcon,test.nc -topo land_sea_mask.nc

The topography on the same resolution is given by:

cdo -f nc  -remap,test.nc -topo topography.nc

Some graphics using the masks: