Regridding using CDO
Added by Angelo Teixeira Lemos 3 months ago
Dear colleagues,
I am using the following cdo command to obtain the information of a grid file (from AQUA/Modis):
cdo griddes file_AQUA.nc
- gridID 1
#
gridtype = lonlat
gridsize = 37324800
xsize = 8640
ysize = 4320
xname = lon
xlongname = "Longitude"
xunits = "degrees_east"
yname = lat
ylongname = "Latitude"
yunits = "degrees_north"
xfirst = -179.9792
xinc = 0.04166667
yfirst = 89.97916
yinc = -0.04166667 # - gridID 2
#
gridtype = generic
gridsize = 768
xsize = 256
ysize = 3
cdo griddes: Processed 3 variables [0.00s 11MB]
My next step was to generate a text file with the grid information of the AQUA/Modis file through the command:
cdo griddes file_AQUA.nc > grid_file_AQUA.txt
I would like to use this text grid file information to regridding a NetCDF file (from ORAS5).
I am using this command:
cdo -O remapbil,grid_file_AQUA.txt file_ORAS.nc new_file_ORAS.nc
The file was created, but the temperature variable is incorrect when I tryied to extract it.
(Expected COUNT to be positive)
Anyone can help?
Replies (1)
RE: Regridding using CDO - Added by Estanislao Gavilan 3 months ago
Hi Angelo,
I think the the problem is your yinc is negative and it should be positive. It could be a consequence of your yfirst. Try to change the signs to see if it works. Also, I can observe that you have 2 grids..(gridID 1 and 2). That is going to give you trouble. Your grid file should only have information about the destination grid, so you must delete the repeated information.
Kind regards,
Estanislao