[ncl-talk] regrid to EASE grid

Dennis Shea shea at ucar.edu
Tue Sep 6 17:03:50 MDT 2016


The 'EASE.nc' and 'CCSM4.nc" files are not available. However, the source
CCSM4 file contained data on a rectilinear grid. We have several EASE grid
files which contain the latitude and longitudes for several EASE
configurations. Hence, you want rectilinear to curvilinear regridding.
Attached is a sample output (png) and the NCL script used. The script is
similar to ESMF_regrid_9.ncl

I have placed the source ERAI file and several files containing various
latitude and longitude grid configurations at the following ftp location:

ftp ftp.cgd.ucar.edu
anonymous
your_email
prompt
cd pub/shea/ESMF_EASE
ls
mget *
quit

   518856   sep  6 16:54 EaseLatLon_100km.nc
 33224032 sep  6 16:54 EaseLatLon.1441x1441.nc
   8317800 sep  6 16:54 EaseLatLon.721x721.nc

 43913096 sep 6  16:55 erai_1989-2009.mon.msl_psl.nc

The example uses the EASE (721,721) grid.

You may wish to test the bilinear and conservative methods.
Generating the weights for the conservative method may take some time.

Good Luck





On Mon, Sep 5, 2016 at 9:39 PM, Peter Gibson <peter.gibson at unsw.edu.au>
wrote:

> Hi all,
>
>
> I am attempting to regrid ERA-Interim to an EASE grid, using for example
> the script https://www.ncl.ucar.edu/Applications/Scripts/ESMF_regrid_9.ncl
>
>
> The files "EASE.nc" and "CCSM4.nc" are not available on the example data
> page http://www.ncl.ucar.edu/Applications/Data/
>
> can they please be added?
>
>
> Regards,
> Peter
>
>
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