ctsm5.4.041

[CTSM Gatekeeper]

*** RESPONSES TO THIS EMAIL WILL NOT BE READ ***
===============================================================
Tag name: ctsm5.4.041
Originator(s): samrabin (Sam Rabin, UCAR/TSS)
Date: Thu May 21 14:33:36 MDT 2026
One-line Summary: Merge b4b-dev 2026-05-21

Purpose and description of changes
----------------------------------

Regular biweekly merge of b4b-dev to master. Includes the following PRs:
- [ESCOMP/CTSM Pull Request #3199: Update documentation for generating fsurdat/landuse files by slevis-lmwg](https://github.com/ESCOMP/CTSM/pull/3199)
- [ESCOMP/CTSM Pull Request #4007: Improve ctsm_pylib docs by samsrabin](https://github.com/ESCOMP/CTSM/pull/4007)
- [ESCOMP/CTSM Pull Request #3999: Revision of Section 1.5.6 Spinning up the Satellite Phenology Model in user's guide for CLM6 by olyson](https://github.com/ESCOMP/CTSM/pull/3999)
- [ESCOMP/CTSM Pull Request #3947: Technote updates for Hillslope Hydrology, biomass heat storage, and Methane model by swensosc](https://github.com/ESCOMP/CTSM/pull/3947)
- [ESCOMP/CTSM Pull Request #3909: updated BVOC documentation by lkemmons](https://github.com/ESCOMP/CTSM/pull/3909)
- [ESCOMP/CTSM Pull Request #4020: CN allocation tech notes improvements by huiqi-wang](https://github.com/ESCOMP/CTSM/pull/4020)
- [ESCOMP/CTSM Pull Request #4033: Remove table in CN Pools and link to table in CN Allocation by slevis-lmwg](https://github.com/ESCOMP/CTSM/pull/4033)
- [ESCOMP/CTSM Pull Request #4036: User's Guide: Delete "Building the CLM tools*" sections. by samsrabin](https://github.com/ESCOMP/CTSM/pull/4036)
- [ESCOMP/CTSM Pull Request #3223: Fix broken documentation links by adrifoster](https://github.com/ESCOMP/CTSM/pull/3223)

Bugs fixed
----------

List of CTSM issues fixed (include CTSM Issue # and description):
- [ESCOMP/CTSM Issue #1718: User's Guide: How to use the new mksurfdata_esmf tool](https://github.com/ESCOMP/CTSM/issues/1718)
- [ESCOMP/CTSM Issue #3478: Update and delete outdated docs for creating input data](https://github.com/ESCOMP/CTSM/issues/3478)
- [ESCOMP/CTSM Issue #3075: Improve ctsm_pylib documentation](https://github.com/ESCOMP/CTSM/issues/3075)
- [ESCOMP/CTSM Issue #3976: User's Guide update: Section 1.5.6 Sp spin-ups](https://github.com/ESCOMP/CTSM/issues/3976)
- [ESCOMP/CTSM Issue #3735: Document the biomass heat storage parameterization in the technical note](https://github.com/ESCOMP/CTSM/issues/3735)
- [ESCOMP/CTSM Issue #3872: Review 2.26. Methane Model](https://github.com/ESCOMP/CTSM/issues/3872)
- [ESCOMP/CTSM Issue #3876: Review 2.30. Biogenic Volatile Organic Compounds (BVOCs)](https://github.com/ESCOMP/CTSM/issues/3876)
- [ESCOMP/CTSM Issue #3866: Review 2.20. C and N Allocation; and make updates](https://github.com/ESCOMP/CTSM/issues/3866)
- [ESCOMP/CTSM Issue #3863: Review 2.17. CN Pools; and update](https://github.com/ESCOMP/CTSM/issues/3863)
- [ESCOMP/CTSM Issue #2767: Broken external links in Tech Note and User's Guide](https://github.com/ESCOMP/CTSM/issues/2767)

Notes of particular relevance for users
---------------------------------------

Changes to documentation: Lots. See lists of PRs and issues above.

Testing summary:
----------------

[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
-------------

Pull Requests that document the changes (include PR ids):
- [ESCOMP/CTSM Pull Request #4040: ctsm5.4.041: b4b-dev merge 2026-05-21 by samsrabin](https://github.com/ESCOMP/CTSM/pull/4040)
- See also list of PRs in "Purpose and description of changes" above.

===============================================================
===============================================================