I have a large number of NetCDF files from which I would like to extract a small number of variables for one location, and merge them into a new NetCDF file. The dimensions of the files are:
dimensions:
time = 18 ;
level = 65 ;
levelh = 66 ;
domain = 36 ;
I can subtract/merge the files for all domains with something like:
cdo select,name=u,v file1.nc file2.nc out.nc
But all other operators seem to be related to selections in space (e.g. sellonlatbox) or time (e.g. seltimestep), but I can't find a way to select only 1 domain from the NetCDF files. Is this possible with CDO's or NCO's?
Not sure I fully understand the question/intent. NCO treats all dimensions equally. If you want domain #17 then try
ncrcat -v u,v -d domain,17 file1.nc file2.nc out.nc
If file1.nc and file2.nc are not sequential in a record coordinate then try
ncecat -v u,v -d domain,17 file1.nc file2.nc out.nc
ADDED 20180929:
or if you don't like that, and the files do not have a record dimension yet are time-sequential then before using ncrcat turn the temporal dimension into a record coordinate for each file with
ncks -O --mk_rec_dmn time file1.nc file1.nc
ncks -O --mk_rec_dmn time file2.nc file2.nc
...
etc. and proceed as above. That may be the best way forward with NCO.