Add a step for remapping iceberg climatologies

[xylar]

This is used in E3SM runs with data iceberg freshwater fluxes.

Checklist

• Developer's Guide has been updated
• API documentation in the Developer's Guide (api.rst) has any new or modified class, method and/or functions listed
• Documentation has been built locally and changes look as expected
• Document (in a comment titled Testing in this PR) any testing that was used to verify the changes

[xylar]

I'm seeing a seam at +/- 180 so I need to figure out what's going wrong there. Probably the non-monotonic longitude.

[xylar]

Okay, finally got rid of the seam:

[jonbob]

I remember the same issue when Darin and I were first working on this....

[xylar]

There really is a block of zeros on the east and west sides of the data!

[xylar]

@jonbob and @darincomeau, I'm not necessarily asking for a review of the code here (though that's fine if you want to). But it would be nice to have you double check that the 4 files:

/lcrc/group/e3sm/data/inputdata/ice/mpas-seaice/ECwISC30to60E3r1/Iceberg_Climatology_Merino.ECwISC30to60E3r1.20230815.nc
/lcrc/group/e3sm/data/inputdata/ice/mpas-seaice/IcoswISC30E3r1/Iceberg_Climatology_Merino.IcoswISC30E3r1.20230815.nc
/lcrc/group/e3sm/data/inputdata/ice/mpas-seaice/RRSwISC6to18E3r1/Iceberg_Climatology_Merino.RRSwISC6to18E3r1.20230818.nc
/lcrc/group/e3sm/data/inputdata/ice/mpas-seaice/SOwISC12to60E3r1/Iceberg_Climatology_Merino.SOwISC12to60E3r1.20230815.nc

look okay by whatever approach you would like to take to look at them. I looked at January of Iceberg_Climatology_Merino.IcoswISC30E3r1.20230815.nc in paraview but that's the most I've done so far.

[xylar]

Testing

I ran the files_for_e3sm/remap_iceberg_climatology step designed for existing meshes for the 4 meshes listed above. I also ran it for the Icos240E3r1 within the full compass mesh generation workflow. All test cases succeeded in producing the desired output file, and the Icos240E3r1 and IcoswISC30E3r1 January outputs looked as expected in Paraview.

[xylar]

@jonbob and @darincomeau, unless you have feedback on the iceberg melt files, I think I'll merge this based on my testing.