ctsm5.4.035

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Tag name: ctsm5.4.035
Originator(s): erik (Erik Kluzek,UCAR/TSS,303-497-1326)
Date: Sun Apr 26 09:38:17 PM MDT 2026
One-line Summary: Merge b4b-dev to master

Purpose and description of changes
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Update submodules, enforce irrigate to off for FATES transient cases, and several documentation updates. Including a github action that will trigger when a PR has a build failure for the documentation. It will then add a comment to the PR summarizing the error. Hopefully, this will be easier for doc editors to understand what broke in the build for their PR.

When a PR has the "build docs" tests fail, it's hard to figure out why. This PR will make it so that the doc build log is posted in a PR comment after the test failure. Example samsrabin#17 (comment).

Since ctsm5.3.046: patch%itype is set to -999, which produces out-of-bounds error, when running HIST with fates, since the defaults point to irrigate=.true..

Though there is irrigate=.true. in use_cases, all the statements with .true. value have use_crop=.true. which can not be true when fates is on.

Bugs fixed
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List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:

Fixes #3170
Most of #3861 except #3968

Notes of particular relevance for users
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Changes made to namelist defaults (e.g., changed parameter values):
For FATES ensure that irrigate is off for transient cases

Changes to documentation: Updates to the mizuRoute and dust emission chapters

Contributors: @dmleung @nmizukami @samsrabin @olyson @mvdebolskiy Claude Sonnet 4.6 and Opus 4.7 1M

Testing summary: regular
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[PASS means all tests PASS; OK means tests PASS other than expected fails.]

build-namelist tests (if CLMBuildNamelist.pm has changed):

derecho -

python testing (if python code has changed; see instructions in python/README.md; document testing done):

derecho -

regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):

derecho -----
izumi -------

If the tag used for baseline comparisons was NOT the previous tag, note that here:

Answer changes
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Changes answers relative to baseline: No bit for bit

Other details
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List any git submodules updated (cime, rtm, mosart, cism, fates, etc.): ccs_config, cime, cmeps
Update to the latest submodules for the time. This is beyond the versions in cesm3_0_beta08

ccs_config to ccs_config_cesm1.0.83 (includes grids for the new t233 ocean mask for MOM)
cime to cime6.1.176
cmeps to cmeps1.1.44

Pull Requests that document the changes (include PR ids):
(https://github.com/ESCOMP/ctsm/pull)

#3624 -- dust emission chapter in Tech Note
#3925 -- mizuRoute chapter in Tech Note
#3955 -- New workflow to add comments to PR about a failure in the doc-build action
#3938 -- Update submodules
#3812 -- Ensure irrigate is FALSE for FATES for transient cases

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