[pyngl-talk] reading wrf output without lat lon variables

Huseyin Ozdemir huseyin at envs.au.dk
Mon Oct 29 07:17:19 MDT 2018

Hi everyone,

I have a problem with reading wrf output file (Projection is Polar Stereographic); i want to compare wrf model output with observations at specific latitude-longitude coordinates, but output netcdf file has no latitude and longitude variables. 

I am using my python environment for reading this netcdf file, where PyNGL and PyNIO are already installed. As an example, temp variable in this output has attributes below:

short T2 [ Time|1, south_north|150, west_east|150 ]	 
      FieldType : 104
      MemoryOrder : XY 
      description : TEMP at 2 M
      units : K
      stagger : 
      coordinates : XLONG XLAT XTIME
      add_offset : 273.8086
      scale_factor : -0.0005068767

Here, T2 variable has “Time", “south_north" and “west_east” dimensions and “south_north" and "west _east" dimensions have both 150 grids.  There is no XLAT and XLONG variables in the netcdf output, so how can i get the temperatures at any lat-lon points with just grid numbers? 

Thanks in advance,


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