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Problems adding invariant SST from OI to ERA5 data


New member
I am using ERA5 data from Copernicus, and wanting to use an initial SST field from the OI dataset, using a different date to those of the model run. I have converted the SST to intermediate format using the pywinter package and checked that when I convert it back to netcdf it matches the original SST timestep field.
I am using ERA_INVARIANT and the SST intermediate file in the constants name section of WPS. I have changed the date of the SST intermediate file to match the first timestep of the model run.
Everything runs and I get model output. However, when I look at the SST field in the model output it makes no sense. However if I just run everything with the ERA5 SST field I can see a sensible SST field in the output. I don't know what is wrong I'm afraid. Attached are screenshots of the two different SST fields and the namelist.wps file


  • namelist.wps
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  • SST_from_ERA5.png
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  • SST_from_OI.png
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Thank you. I have tried to modify METGRID.TBL as shown. If I add "from input =SST" as shown, the attached error is returned. If I just add the landmask as shown then the whole thing runs but with the same problem as before. Should I be using a different land mask for the OI SST? If so where do I obtain this? To reiterate, I didn't use ungrib on the OI dataset, as it is supplied as netcdf, so I used the pywinter package to create the intermediate file, without the use of a Vtable. I think there is something that I am not understanding here!


  • METGRID.TBL_entry _for_SST.png
    METGRID.TBL_entry _for_SST.png
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  • returned_error.png
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