[slevis-lmwg]

Description of changes

Similar to #4223 but for g16, g17, g37 grids

• testlist_clm.xml but left grids unchanged that did not have replacements yet, see next checkbox
• still to add to ccs_config
  • ne30_t233 and f19_t233_gris4
  • Erik to merge ccs_config_cesm1.0.94: Fix model grid alias inconsistencies in CISM/DGLC grids ESMCI/ccs_config_cesm#313 and make new tag ccs_config_cesm1.0.94
  • Update to the new tag here or as separate PR, Erik is ok with either (same comment below for RTM/MOSART)
• anything g37 --> t201
  • check my work so far
  • update unchanged ones
• Sam R. says below that the RXCROPMATURITY* tests need the grids to match, so crop cal. files need updating; do this in this PR or open an issue? UPDATE: The crop cal. files probably do not need updating because they do not care about the ocean grid.
• Update RTM, MOSART grids in rtm1_0_90: Move g17/g37 grids to t233/t201 RTM#69 and mosart1.1.14: Replace g37 grid with t201 in mosart test-suite MOSART#131 and make new tags; see if I can fold other RTM/MOSART issues into this:
  • Remove CLM45 compset from testing as CTSM is deprecating and removing it from compsets RTM#68
  • Route new GLC runoff fluxes, or at least ensure that they're zero for now RTM#52 <-- not done
  • RTM does not have the history_tape_in_use functionality RTM#62 <-- not done
  • Fix logic for ctl%rof_from_glc MOSART#114 <-- not done
  • Remove SMS_D_Ld5.f10_f10_mt201.I1850Clm60Sp.derecho_nvhpc.mosart-default from expected fails MOSART#109 <-- not done
  • Update to the new tags: in .gitmodules update to rtm1_0_90 and mosart1.1.14

Specific notes

Contributors other than yourself, if any: @ekluzek

CTSM issues resolved or otherwise addressed, if any:
Contributes to #2540 (resolves?)

Testing planned or performed, if any:
aux_clm and others, see below

Erik, editing to say we should run most test lists as almost all tests change:

• aux_clm Derecho
• aux_clm Izumi
• fates Derecho
• fates Izumi
• ctsm_sci Derecho

Requirements before merge:

• I have followed the CTSM contribution guidelines.

• The code in this PR branch builds with no errors.
• The code in this PR branch runs with no errors. Briefly describe tested configuration(s):
• This does not change answers for unchanged tests; tests going from gx grids to t233 run on the new grid and have their names updated, so the test-suites will not compare them to the baseline
• This PR includes required documentation updates (see guidelines for contributing documentation).

[ekluzek]

I'd call this as something that should go on master, because when compsets change you can't verify that things are b4b. And hence it could hide an accidental non-b4b change on the b4b-dev branch after this was merged.

[ekluzek]

We went over this together. And I noted the thing about g37 grids should be t201 as the low resolution MOM grid. And we realized that MOSART and RTM (and ccs_config) also need to be updated similarly.

[slevis-lmwg]

Marking "blocked" due to the checkbox above stating that we need to "add to ccs_config: ne30_t233, f19_t233_gris4 and make new tag"

[slevis-lmwg]

Since updating submodules... Consider updating CIME for #4239 here?

From meeting with Erik: No, because this PR here is effectively an answer-changing PR.

[slevis-lmwg]

• FAIL... Regarding the LVG test, Erik suggested pointing the test to the finidat generated previously by the test itself to see if it passes; I pointed to the finidat found in the test's case2 (manually reintroducing use_init_interp and related settings as found in the original test, but exice is still different) and rerunning cs.status.20261016_182626_h14wtz
• FAIL... Repeat with the finidat found in the test's case1 (manually reintroducing use_init_interp and related settings as found in the original test, but exice is still different) and rerunning cs.status.20261016_182626_h14wtz
• PASS Confirm that LVG passes vanilla ctsm5.4.063: ./create_test LVG_Ld5_D.f10_f10_mg37.I1850Clm60Bgc.derecho_intel.clm-no_vector_output -c /glade/campaign/cgd/tss/ctsm_baselines/ctsm5.4.063 with cs.status.20261016_183745_cle1ai

[billsacks]

Sorry that I didn't see the question about the LVG test earlier.

I do not expect changing finidat to resolve this.

I checked the test failure, and I see that the only field that differs is PCT_GLC_MEC. I think the right thing to do is to simply exclude this history field from the test, using hist_fexcl. You can do this via append_to_user_nl_files in lvg.py. (You can give a list of strings to append to the user_nl files; do this hist_fexcl for both case1 and case2.)

I think I understand why this is needed: There is a grid cell on the south tip of South America that has 0% glacier which must newly be present within the land mask (I haven't looked at the change in land mask, but I assume that's why it's a problem now). In the base case, this has 0% for each glacier column, but in the case with extra virtual glacier, it must fall within the Antarctica mask, and so it is given non-zero percentages in each column. This is a fine difference and should just be ignored.

[slevis-lmwg]

In prep for the merge
./run_sys_tests -s aux_clm -c ctsm5.4.065 -g ctsm5.4.065_PR4234

• izumi
• derecho investigate

    FAIL LII2FINIDATAREAS_D_P256x2_Ld1.f09_t232.I1850Clm60BgcCrop.derecho_intel.clm-default--clm-matrixcnOn_ignore_warnings COMPARE_base_no_interp
    FAIL LII2FINIDATAREAS_D_P256x2_Ld1.f09_t232.I1850Clm60BgcCrop.derecho_intel.clm-default COMPARE_base_no_interp

My comment from last time sounded as though I had resolved the LII2 test failures, but it seems I forgot to update their grids in testlist_clm.xml, so doing now.

• other tests: see ccs_config_cesm1.0.94: Fix model grid alias inconsistencies in CISM/DGLC grids ESMCI/ccs_config_cesm#313
• derecho ./run_ctsm_py_tests -u
• derecho ./run_ctsm_py_tests -s
• derecho ./build-namelist_test.pl

[slevis-lmwg]

Most recent testing discussed in the ccs_config PR. Erik and I agreed to remove a failing test as irrelevant because it turns on matrixcn in an IHist compset.

[slevis-lmwg]

• Remove three PASS listed in ccs_config_cesm1.0.94: Fix model grid alias inconsistencies in CISM/DGLC grids ESMCI/ccs_config_cesm#313 (comment) from the expected fails!

[slevis-lmwg]

@ekluzek I will rerun aux_clm now that I have fully updated ccs_config. I expect the same results that I got when I ran aux_clm from ESMCI/ccs_config_cesm#313.

./run_sys_tests -s aux_clm -c aux_clm-ctsm5.4.067-ccs_config_cesm1.0.94 -g ctsm5.4.067

• derecho
• izumi
• update ChangeLog/Sum
• I repeated python and namelist testing seen above

Could you do a final review of this PR?

[slevis-lmwg]

@ekluzek testing was good, so I'm ready.

[slevis-lmwg]

Both LII2 tests need to go back to t232 as part of reverting namelist_defaults as per Erik's review.