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Add new GLC grid: mpas.gis4to40km #138

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@matthewhoffman matthewhoffman commented Feb 13, 2025

This is a medium resolution Greenland grid for MALI. It will replace the gis20km grid for testing. It is the first MALI Greenland grid to extend far enough into the ocean to ensure overlap with MPAS-Ocean meshes, which is needed for OCN-GLC thermal forcing coupling used for Greenland fjords. E3SM grids are added that include this mesh paired with the other component grids for the suite of v3 BG, IG, and GG cases currently being used.

This commit includes all the config file changes to support the grid, but the the mapping filenames are placeholders (marked with XXX) to be filled in subsequently.

@matthewhoffman matthewhoffman added the in progress Still being worked on, don't merge yet! label Feb 13, 2025
@matthewhoffman matthewhoffman marked this pull request as draft February 13, 2025 05:59
This is a medium resolution Greenland grid for MALI.  It will replace
the gis20km grid for testing.  It is the first MALI Greenland grid to
extend far enough into the ocean to ensure overlap with MPAS-Ocean
meshes, which is needed for OCN-GLC thermal forcing coupling used for
Greenland fjords.  E3SM grids are added that include this mesh paired
with the other component grids for the suite of v3 BG, IG, and GG cases
currently being used.

This commit includes all the config file changes to support the grid,
but the filenames for the grid itself and the mapping files are
placeholders (marked with XXX) to be filled in subsequently.
@matthewhoffman matthewhoffman force-pushed the matthewhoffman/mali/gis-4km-mesh branch from 5333c2c to 8e4313e Compare February 13, 2025 06:13
@andrewdnolan
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andrewdnolan commented Feb 13, 2025

Here's some plots of the overlap of this new mpas.gis4to40km MALI grid and IcoswISC30E3r5 MPAS-O mesh:

Overview map:
Alexs_version_overlap
The area's with the orange boxes were two area's of concern, where we thought there might not be enough overlap. But upon closer inspection everything seems to be OK.

South Area:
Screenshot 2025-02-13 at 11 47 07 AM
While there is missing overlap, there are no nearby marine terminating glacier that will be affected by this.

Eastern Area:
Screenshot 2025-02-13 at 9 09 10 AM
While there is an unconnected fjord, that fjord is not resolved at 4km resolution so there shouldn't be any issues.

matthewhoffman and others added 2 commits February 14, 2025 14:23
Files have been added to the inputdata server with world readable
permissions.
@matthewhoffman
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@jonbob , thinking about it more, I think it would also be useful to pair this mesh with the ultra-low-res oQU240wLI ocean mesh. Are there corresponding atm and lnd meshes for ultra-low-res testing, or is oQU240wLI primarily used for G-case testing?

cc: @xylar and @cbegeman

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3 participants