Since CDO is not able to understand variable-length strings yet (which also only were added to the CF conventions in CF 1.9 (September 2021)), we encode the sector variable as fixed length string according to https://docs.xarray.dev/en/stable/user-guide/io.html#string-encoding
Fixes #57.
Since CDO is not able to understand variable-length strings yet (which also only were added to the CF conventions in CF 1.9 (September 2021)), we encode the sector variable as fixed length string according to https://docs.xarray.dev/en/stable/user-guide/io.html#string-encoding