NARR mapping

Hello,

Can anyone tell me what I¹m doing wrong? Thank you very much in advance.

I am having trouble plotting NARR data on a map. When I do my calculation,
the coordinate information in the data gets lost. I try to define the
dimensions, add coordinate variables but there is a problem. In the
following, I read in the 2d latitude and longitude from the NARR temperature
file, calculate the temperature difference from climatology (dT) and then
try to define the dimensions and coordinate variable. I get the following
error:

fatal:No coordinate variable exists for dimension (lat2d) in variable (dT)
fatal:(lat2d) is not coordinate variable in variable(dT).
fatal:Execute: Error occurred at or near line 58 in file TUK_T.ncl

NCL Script:

   lat2d=e->lat
   lon2d=e->lon

   
    dT=Tw-Tavg

     dT!0 = "lev"
     dT!1 = "lat2d"
     dT!2 = "lon2d"

   dT_at_lat2d = lat2d
   dT_at_lon2d = lon2d

  dT&lat2d_at_units="degrees_north"
  dT&lon2d_at_units="degrees_east"

-- 
David Small
Graduate Research Assistant
Department of Atmospheric and Oceanic Sciences
McGill University
Montreal, Quebec, Canada

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Received on Tue Feb 10 2009 - 21:40:45 MST