Re: ESMF_grid stalls when converting many fields

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Wed May 01 2013 - 11:06:53 MDT

Not much info to determine the problem.

[1] 200MB is not particularly large. Nor is 40-50 variables.

[2] How did you generate the weight file?
     Did you write the NCL script or did you use the template at
        Example 25
     This would generate a weight file which you could use for
     all subsequent regridding via:

[3] How are you writing the netCDF file? NCL allows 2 different ways
     to create netCDF: one is the 'simple but, possibly, inefficient'
     method; the other requires predefintion of the output
     netCDF file's contents.


     While 40-50 is not a large number of variables per se, When you
     use the simple method this could be slow for assorted reasons.

[4] The following may be useful to look at.
     (a) generate weight file

     (b) use weight file generated in (a) to regrid multiple
         variables and write to netCDF via simple* method

     (c) same as (b) BUT uses 'efficient (predefine)' method to
         write netCDF. This requires a double pass over the data
         (i) predefine output file's contents (structure);
         (ii)write regridded variables to predefined file.

On 05/01/2013 08:54 AM, Patrick Kelly wrote:
> Hello NCL community–
> I am trying to use the 'ESMF_grid'
> to convert output from the CESM HOMME model to a rectilinear grid.
> The file is about 200mb large and contains maybe 40-50 variables.
> The procedure works fine at the start, but then stalls about half way
> through without any error message.
> NCL doesn't quit, it just "hangs" Indefinitely.
> IS this a memory limit or stack issue thing with NCL? I thought I'd
> receive some error output if it was...
> Thanks for any leads,
> Patrick
> -----------------------------------------------
> Patrick Kelly, Ph.D.
> Postdoctoral Research Associate
> University of Miami / RSMAS
> email: <>
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Received on Wed May 1 11:07:02 2013

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