CDO

Hello,

is there any respond to this issue?

Best regards,
Marie

mostofa kamal wrote:

Hi All,

I am trying to apply the CDO daymin, daymax, monmean, daymean function to the ARW WRF output but getting the following warning message every time. I do not know whether it is just a warning message or I have to concern about result generated by the above CDO function. I look forward to hearing from you.

[kamal@bro95 DAYMET]$ cdo daymax wrfout_d01_2002.nc dmax_wrfout_d01_2002.nc
Warning (cdfSetVar) : Inconsistent variable definition for XLAT_U!
Warning (cdfSetVar) : Inconsistent variable definition for XLONG_U!
Warning (cdfSetVar) : Inconsistent variable definition for XLAT_V!
Warning (cdfSetVar) : Inconsistent variable definition for XLONG_V!
Warning (define_all_grids) : Time varying grids unsupported, using grid at time step 1!
cdo daymax: Processed 5329170568 values from 132 variables over 248 timesteps. ( 122.10s )

Thanks
Kamal
University of Waterloo, Canada

The WRF grid coordinates are defined with the Time dimension:

float XLAT(Time, south_north, west_east) ;
float XLONG(Time, south_north, west_east) ;

This could mean that the horizontal grid coordinates change in time. CDO does not support grids which varies in time. In this case CDO is using only the grid coordinates from the first time step.
As far as I know the grid information of a WRF netCDF file is the same on all time steps. In this case the Warning messages can be ignored.