ctsm5.4.031

[CTSM Gatekeeper]

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Tag name: ctsm5.4.031
Originator(s): samrabin (Sam Rabin, UCAR/TSS)
Date: Thu Apr 9 13:30:18 MDT 2026
One-line Summary: b4b-dev merge 2026-04-09

Purpose and description of changes
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Includes the following PRs:
- [ESCOMP/CTSM Pull Request #3833: Fix typos and RST issues in Surface Characterization tech note by huiqi-wang](https://github.com/ESCOMP/CTSM/pull/3833)
- [ESCOMP/CTSM Pull Request #3834: Fix grammar, equation 9.17/9.18 LaTeX, and eq. ref in Photosynthesis … by huiqi-wang](https://github.com/ESCOMP/CTSM/pull/3834)
- [ESCOMP/CTSM Pull Request #3837: Documentation updates: New hist time handling by slevis-lmwg](https://github.com/ESCOMP/CTSM/pull/3837)
- [ESCOMP/CTSM Pull Request #3896: Testlist review and update for aux_cime_baselines and prealpha by ekluzek](https://github.com/ESCOMP/CTSM/pull/3896)
- [ESCOMP/CTSM Pull Request #3903: Fix allocate error message typo in mkurbanparMod by olyson](https://github.com/ESCOMP/CTSM/pull/3903)
- [ESCOMP/CTSM Pull Request #3838: Replace cheyenne references with derecho throughout by slevis-lmwg](https://github.com/ESCOMP/CTSM/pull/3838)
- [ESCOMP/CTSM Pull Request #3908: Update documentation documentation by samsrabin](https://github.com/ESCOMP/CTSM/pull/3908)


Bugs fixed
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List of CTSM issues fixed (include CTSM Issue # and description):
- [ESCOMP/CTSM Issue #3171: Docs needed: New history time handling](https://github.com/ESCOMP/CTSM/issues/3171)
- [ESCOMP/CTSM Issue #3784: Review tests in aux_cime_baselines and reconcile this test list with prealpha](https://github.com/ESCOMP/CTSM/issues/3784)
- [ESCOMP/CTSM Issue #3898: A typo in the mkurbanparMod.F90 code](https://github.com/ESCOMP/CTSM/issues/3898)
- [ESCOMP/CTSM Issue #2223: Docs: Change Cheyenne references to Derecho](https://github.com/ESCOMP/CTSM/issues/2223)
- [ESCOMP/CTSM Issue #3892: User's Guide: Add "Contributing to documentation" documentation](https://github.com/ESCOMP/CTSM/issues/3892)


Notes of particular relevance for developers:
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Changes to tests or testing: Adjusts some of the prealpha and aux_cime_baseline tests.


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

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

derecho ----- OK
izumi ------- OK


Other details
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List any git submodules updated (cime, rtm, mosart, cism, fates, etc.):
- doc-builder updated from v2.2.6 to v3.0.1

Pull Requests that document the changes (include PR ids):
- [ESCOMP/CTSM Pull Request #3917: Merge b4b-dev to master 2026-04-09 by samsrabin](https://github.com/ESCOMP/CTSM/pull/3917)

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