add landice gridcomp

[weiyuan-jiang]

Add functionality to simulate landice tiles in GEOSldas.

See GEOS-ESM/GEOS_Util#137 for test results.

Dependencies:

• Add landice gridcomp GEOSldas#705 (modified sparse checkout of GEOSgcm_GridComp).
• remap_restarts package: bug fix and minor change to accommodate GEOSldas requirements GEOS_Util#137 (for remapping; merged 15 May 2025)
• use nc4 tile file when remapping restarts GEOSgcm_GridComp#1094 (nc4-formatted tile file; merged 15 May 2025)

Note: CI build tests of the present PR failed prior to the merging of GEOS-ESM/GEOSldas#705 because of the dependency on the changes in GEOS-ESM/GEOSldas#705

[gmao-rreichle]

@weiyuan-jiang: I just came across the following assumption in pre-processing: the *.til file must have all of the land tiles at the beginning. This has worked so far, but it is not a safe assumption (as noted in my comment from 2020). You are probably already aware of it in the context of the present PR, but I'm mentioning it here just in case.

GEOSldas_GridComp/GEOSldas_App/preprocess_ldas_routines.F90

Line 2125 in 05bbcca

! assume all land tiles are at the beginning

    ! assume all land tiles are at the beginning
          ! UNSAFE ASSUMPTION! - reichle, 2 Aug 2020
          
          if (typ/=MAPL_Land .and. typ/=MAPL_Land_ExcludeFromDomain) then   ! exit if not land
             
             if (logit) then
                write (logunit,*) 'WARNING: Encountered first non-land tile in *.til file.'
                write (logunit,*) '         Stop reading *.til file under the assumption that'
                write (logunit,*) '           land tiles are first in *.til file.'
                write (logunit,*) '         This is NOT a safe assumption beyond Icarus-NLv[x] tile spaces!!'
             end if
             
             exit ! assuming land comes first in the til file
             
          end if

[gmao-rreichle]

@weiyuan-jiang: I just came across the following assumption in pre-processing...

PS: The exact same code appears again a couple of hundred lines later:

GEOSldas_GridComp/GEOSldas_App/preprocess_ldas_routines.F90

Line 2378 in 05bbcca

! assume all land tiles are at the beginning

[lcandre2]

1d outputs now work well for landice only experiments. Modifications to the default history file have been added.

[lcandre2]

[gmao-rreichle]

@weiyuan-jiang : I went through the "Files changed" and tried to clean up. I committed the changes separately for each file. The cumulative changes can be seen wit this link:
https://github.com/GEOS-ESM/GEOSldas_GridComp/compare/a2d55fc..e5fad70?w=1
(white-space changes hidden)
The bulk of the changes is in one file: preprocess_ldas_routines.F90, and these changes are the trickiest ones:
e5fad70
Please review when you get a chance.

[weiyuan-jiang]

@lcandre2 Please note that my last commit changes the input of TILE_TYPES. Now it becomes numbers with blank space as separator.