[ncl-talk] ESMF_regrid

[Laura Fowler]

Hello:

I would like to use EMSF_regrid to regrid a MPAS unstructured mesh (with
655362 cells) to another MPAS unstructured mesh (with 1622018 cells). Below
are the options I use to do so:

   opt = True

   opt at Debug = True

   opt at ForceOverwrite = True

   opt at SrcGridLon = lonCellSrc ; source grid longitude input.

   opt at SrcGridLat = latCellSrc ; source grid latitude input.

   opt at SrcTriangularMesh = fSrc->cellsOnVertex-1


   opt at DstGridLon = lonCellDst ; destination grid longitude input.

   opt at DstGridLat = latCellDst ; destination grid latitutde input.

   opt at DstGridType  = "unstructured"

   opt at SrcFileName  = "source.grid_onCells.655362.to_1622018.nc"

   opt at DstFileName  = "destination.grid_onCells.655362.to_1622018.nc"

   opt at WgtFileName  = "weights.grid_onCells.655362.to_1622018.nc"



When I run my script, I get the following message:


Number Of Attributes: 0

(0) get_src_grid_info: source lat dims = (655362)

(0) get_src_grid_info: source lon dims = (655362)

(0) get_src_grid_info: source grid type is 'unstructured'

(0) unstructured_to_ESMF: using triangular mesh provided by the user

(0) min/max ElementVertices = 0/655361

(0) unstructured_to_ESMF: total number of elements created: 1310720

(0) unstructured_to_ESMF: Element Area: min:6.114026940950978e-06
max:9.902497945857291e-06

(0) write_grid_description_file: writing unstructured 'Src' grid to an ESMF
description file

(0) get_dst_grid_info: destination lat dims = (1622018)

(0) get_dst_grid_info: destination lon dims = (1622018)

(0) unstructured_to_ESMF: triangulating the data to create the edges for
your unstructured data.

(0)                       This can be VERY slow if you have a large array.

(0)                       To speed up code, provide your own edge vertices
via the

(0)                       'ElementVertices' option.



How do I use the ElementVertices option to speed up the interpolation. Do I
use that option for the Source file or the Destination file. I did not see
any documentation related to that option?

Thanks,
Laura



-- 
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Laura D. Fowler

Mesoscale and Microscale Meteorology Division (MMM)
National Center for Atmospheric Research
P.O. Box 3000, Boulder CO 80307-3000

e-mail: laura at ucar.edu
phone: 303-497-1628

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