[ncl-talk] regrid tri-polar grid to rectilinear

[Will Hobbs]

Hi Micah

Regridding can take a long time, depending on the resolution of the input/output grids.

If you’re likely to perform the same regridding operation regularly, then you can save a lot of time by saving the regrid weight files (the generation of these is the ‘slow’ bit) which can then be re-used in future regrid operations. For that approach, I **strongly** recommend that you use the ESMF regrid tools (https://www.ncl.ucar.edu/Applications/ESMF.shtml)

All the best,
Will

From: ncl-talk <ncl-talk-bounces at mailman.ucar.edu> on behalf of Micah Sklut via ncl-talk <ncl-talk at mailman.ucar.edu>
Reply to: Micah Sklut <micahs2005 at gmail.com>
Date: Thursday, 13 April 2023 at 10:11 am
To: NCL_Talk <ncl-talk at ucar.edu>
Subject: [ncl-talk] regrid tri-polar grid to rectilinear

Hi,

I have a netcdf file that uses a tri-polar grid.  It is the NCEP RTOFS data. You can see the grid here: https://polar.ncep.noaa.gov/global/about/<https://polar.ncep.noaa.gov/global/about/?>?

I would like to regrid this data to a rectilinear grid. I attempted to use rcm2rgrid, but either it is taking a very long time (hours) or the function is hitting some road block.  I wasn't sure if rcm2rgrid would work for the tri-polar grid.

Is there another approach using ncl to regrid this tri-polar grid to a rectilinear grid?

Thanks.

--
Micah Sklut


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