CDO

Hello,

I'm rather new with cdo operations and linux systems so my problem could be rather trivial. I'm trying to cut a small window out of a netcdf file created with geogrid with the following command:

cdo selindexbox,81,116,92,115 .../.../geo_em.d03.cyprus_1km.nc .../.../geo_em.dHY.cyprus_1km.nc

Checking the dimensions and variables of input and outfile file I can notice some differences. For example:

Dimensions (input file)
Time = UNLIMITED ; // (1 currently)
DateStrLen = 19 ;
west_east = 256 ;
south_north = 176 ;
south_north_stag = 177 ;
west_east_stag = 257 ;
land_cat = 20 ;
soil_cat = 16 ;
month = 12 ;
num_urb_params = 132 ;

Dimensions (output file)
dimensions:
x = 36 ;
y = 24 ;
lev = 20 ;
lev_2 = 16 ;
lev_3 = 12 ;
lev_4 = 132 ;
Times = UNLIMITED ; // (1 currently)

Apparentely I have lost many specs about the meaning of each dimension, is there an option I should use and specify while running the command?

Also, in the output file, some new variables related to lev, lev_2, lev_3, lev_4 appear. How can avoid this?

Thanks in advance for the help.
Corrado