More than just learn NCL. You must understand the
vertical coordinate systems of the source and
destination datasets. You have stated that the source dataset
are on sigma levels. ACtually they are on a hybrid
vertical coordinate system: sigma at the lowest levels
which transition to pressure levels as you go upward in the atmodphers
In your case the source file data are on hybrid levels:
http://www.ncl.ucar.edu/Document/Functions/Built-in/pres_hybrid_ccm.shtml
The provided rl2epa_esmf.regrid2file.ncl actually provided
the vertical pressure values at each grid point. You must determine
how to convert N20 on those level to whatever vertical coordinate
system the EPA model uses.
On 11/29/12 10:15 PM, Tom Roche wrote:
>
> Dennis Shea Thu, 29 Nov 2012 16:25:17 -0700 (rearranged and adapted)
>> ftp ftp.cgd.ucar.ed
>> anonymous
>> email
>> cd pub/shea/ESMF/EPA
>> prompt
>> mget *
>> quit
>
> aka ftp://ftp.cgd.ucar.edu/pub/shea/ESMF/EPA/ with presumably
> ftp://ftp.cgd.ucar.edu/pub/shea/ESMF/EPA/rl2epa_esmf.genwgt.ncl [1]
> ftp://ftp.cgd.ucar.edu/pub/shea/ESMF/EPA/rl2epa_esmf.regrid2file.ncl [2]
>
>> [1} An existing script was modified to generate
>
> ftp://ftp.cgd.ucar.edu/pub/shea/ESMF/EPA/wgt.RL_96x144_to_EPA.conserve.nc
>
>> [containing] the weights used for lat x lon regridding.
> ...
>> [2] Another existing script was modified to interpolate one or
>> more variables to the new grid using the weight file [above].
> ...
>> [3] The script used in [2] can have another vertical
>> interpolation added in the variable loop to make it 3D.
>
> I'll definitely be trying to adapt this to 3D, and learning NCL,
> by 10 Dec--hopefully before, if I get some downtime @ AGU.
>
> Thanks! Tom Roche <Tom_Roche@pobox.com> <Roche.Tom@epa.gov>
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Received on Fri Nov 30 07:48:31 2012
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