ctsm5.4.003: Merge post-5.4 to master#3655
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Derived from half-degree run started 1959-01-01, forced with CRU-JRA, at tag alpha-ctsm5.4.CMIP7.15.ctsm5.3.079. Growing seasons defined by files [sh]dates_ggcmi_crop_calendar_phase3_v1.01_nninterp-hcru_hcru_mt13.2000-2000.20230728_165845.nc. Maximum growing season length in generate_gdds.py derived from mxmat in clm60_params.crop_omni02.c251120.nc with no 'cushion'. generate_gdds.py first season 1995 and last season 2005.
Derived from half-degree run started 1959-01-01, forced with CRU-JRA, at tag alpha-ctsm5.4.CMIP7.15.ctsm5.3.079. generate_gdd20_baseline -v GDDB20 -y1 1995 -yN 2005.
…leName_gdd20_baseline.
post-5.4.n00: New crop calendar inputs and updated params (omni02)
Post 5.4 namelist updates
….85-to-post-5.4 Update 3 user_nl_clm + 2 .cfg files used in testing plus clean-up PR #3637 resolves Issue #3495 An izumi test failure Issue #3642 Add H2OSNO to fincl1 in AD and SASU modes I did some python testing in this PR. I'm saving the full ctsm5.4 testing for PR #3638, which comes next and has no planned code changes.
post-5.4.n01.alpha-ctsm5.4.CMIP7.21.ctsm5.3.085: Update post-5.4 branch to latest alpha5.4 tag
I think I'm merging what should be tag post-5.4.n01.alpha-ctsm5.4.CMIP7.21.ctsm5.3.085
Post-5.4: Fix for RRTMGP errors caused by high surface temperatures.
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I will request reviews from all who contributed PRs to the post-5.4 branch, though I need one approval to merge. Regarding testing:
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olyson
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Dec 11, 2025
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This all looks good to me. I mainly focused on the non-namelist changes.
ekluzek
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Dec 11, 2025
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Description of changes
Update namelist_defaults:
Update default NEON inputs to v4 #3626
Update cismwrap_2_2_010 to cismwrap_2_2_011 and ccs_config_cesm1.0.61_add_domain_ne3np4.pg2_1 to ccs_config_cesm1.0.66 #3626
Remove fsat effect on baf_peatf in the fire code and update the corresponding documentation in
doc/source/tech_note/Fire/CLM50_Tech_Note_Fire.rst#3626Fix for RRTMGP errors caused by high surface temperatures #3643
Specific notes
Contributors other than yourself, if any:
@olyson @wwieder @samsrabin @ekluzek @lifang0209
CTSM Issues Fixed (include github issue #):
Fixes #3589 355+ K land temperature triggers RRTMGP error
Fixes #3598 Change default snow_thermal_cond_glc_method
Fixes #3608 Fire calibration for CLM6 release
Fixes #3594 Update NEON data to v4
Fixes #3321 Crop calendar inputs needed with CRU-JRA climate
Fixes #3658 Move c14_meshfile_none warning test to fatal error
Are answers expected to change (and if so in what way)?
Yes. Looking at aux_clm results:
Testing performed, if any:
On derecho:
OK ./build-namelist_test.pl:
<Test Id: 1291> <Desc: c14_meshfile_none>(Move c14_meshfile_none warning test to fatal error #3658 -- we fixed this)PASS make black and lint
PASS ./run_ctsm_py_tests -u and -s
OK derecho
./run_sys_tests -s aux_clm -c ctsm5.4.002 -g ctsm5.4.003OK izumi
./run_sys_tests -s aux_clm -c ctsm5.4.002 -g ctsm5.4.003 --skip-git-status