Land-Sea Mask ERA-Interim

Hi,

I need to apply the ERA-Interim land-sea mask to a given variable so that the ocean gridpoints will be eventually excluded or set to NaN.

So that the following code quite works

cdo -f nc -setmissval,0 -mul -eqc,0 mask.nc input.nc output.nc

The problem is that the ERA-Interim land-sea mask assigns 0 to sea and 1 to land, which is the opposite case asked in the above question.

How can I adapt the code to my case with 0 = sea and 1 = land?
Thanks

here's the ERA-Interim Land-Sea Mask (taken from https://apps.ecmwf.int/datasets/data/interim-full-invariant/) and a sample of t2m ERA-Interim global dataset.

ERA-Interim_land_sea_mask.nc (230 KB) ERA-Interim_land_sea_mask.nc	ERA-Interim Land-Sea Mask
ERA-Interim_t2m_sample.nc (22.1 MB) ERA-Interim_t2m_sample.nc	t2m ERA-Interim sample

Hi Paolo,

cdo -f nc -setctomiss,0 -mul ERA-Interim_land_sea_mask.nc ERA-Interim_t2m_sample.nc output.nc

-Karin

Dear karin,

it works

Thank you
paolo

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