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For every 6-hour period the IFS suite will create one gridpoint and one spectral forcing file from ERA-Interim analyses at T255L60 reduced linear Gaussian horizontal grid. It is essential that the forcing files have the same horizontal grid and vertical levels as the OpenIFS experiment.
Forcing File Examples
Example Examples for a spectral and a gridpoint forcing file are available for download from http://download.ecmwf.int/test-data/openifs/nudging/examples/ (no login required for access)
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These files were created using the IFS experiment described above. They are in GRIB format and they can be examined using the command line tools available tools available from the ecCodes library (e.g. grib_ls or grib_dump).
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$ grib_ls rlxmlgg201308251200 | head rlxmlgg201308251200 edition centre typeOfLevel level dataDate stepRange dataType shortName packingType gridType 1 ecmf hybrid 1 20130825 0 an q grid_simple reduced_gg 1 ecmf hybrid 1 20130825 0 an ciwc grid_simple reduced_gg 1 ecmf hybrid 1 20130825 0 an clwc grid_simple reduced_gg 1 ecmf hybrid 1 20130825 0 an cc grid_simple reduced_gg 1 ecmf hybrid 1 20130825 0 an o3 grid_simple reduced_gg 1 ecmf hybrid 2 20130825 0 an q grid_simple reduced_gg 1 ecmf hybrid 2 20130825 0 an ciwc grid_simple reduced_gg 1 ecmf hybrid 2 20130825 0 an clwc grid_simple reduced_gg $ grib_ls rlxmlsh201308251200 | head rlxmlsh201308251200 edition centre typeOfLevel level dataDate stepRange dataType shortName packingType gridType 1 ecmf hybrid 1 20130825 0 an lnsp spectral_complex sh 1 ecmf hybrid 1 20130825 0 an vo spectral_complex sh 1 ecmf hybrid 1 20130825 0 an d spectral_complex sh 1 ecmf hybrid 1 20130825 0 an t spectral_complex sh 1 ecmf hybrid 2 20130825 0 an vo spectral_complex sh 1 ecmf hybrid 2 20130825 0 an d spectral_complex sh 1 ecmf hybrid 2 20130825 0 an t spectral_complex sh 1 ecmf hybrid 3 20130825 0 an vo spectral_complex sh |
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