I am trying to use ERA-interim to drive the High-Resolution Land Data Assimilation System (HRLDAS) to run Noah-mp offline from a regional climate model (WRF).
I have so far been able to compile the model and download the ERA-interim data, but I am running into errors when I try to create the forcing files. It appears that ERA-interim GRIB files use a complex packing scheme and "contain additional flags in octet 14". Both of which throw flags in HRLDAS. Does anyone know if how to either acquire ERA-interim in a different format or convert between complex and simple packing schemes in GRIB1 files?
Many Thanks!
Trevor
Dear Trevor,
since High-Resolution Land Data Assimilation System (HRLDAS) can also read NetCDF input data files, have you tried to convert first the Era-Interim GRIB data into the NetCDF format (or download these NetCDF-files directly from the ECMWF)
For the conversion you may use CDO (Climate Date Operators https://code.mpimet.mpg.de/projects/cdo/)
Classical NetCDF: cdo -f nc Input.grb Output.nc
NetCDF4-zipped: cdo -f nc4 -z zip9 Input.grb Output.nc4
or the ncl_convert2nc as part of NCL (NCAR Climate Language)
ncl_convert2nc Input.grb
Hope it helps. Good luck
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