ctsm5.4.026

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Tag name: ctsm5.4.026
Originator(s): glemieux (Gregory Lemieux, LBNL, glem...@lbl.gov)
Date: Wed Mar 18 01:12:09 AM MDT 2026
One-line Summary: Transfer biophysical variables for output with FATES dimensions

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

This pull request updates the high frequency wrapper procedure in the interface to pass
biophysical CLM variables to be output along FATES dimensions. The FATES land use x
pft dimension is also added to the history module. The FATES base land use test module
adds the FATES history noted above to the test output.

Significant changes to scientifically-supported configurations
--------------------------------------------------------------

Does this tag change answers significantly for any of the following physics configurations?
(Details of any changes will be given in the "Answer changes" section below.)

[Put an [X] in the box for any configuration with significant answer changes.]

[ ] clm6_0

[ ] clm5_0

[ ] ctsm5_0-nwp

[ ] clm4_5


Notes of particular relevance for developers:
---------------------------------------------
Changes to tests or testing:
- Landuse history variables adding to the base FatesColdLUH2 test module

Contributors: @ckoven

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

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

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

fates tests: (give name of baseline if different from CTSM tagname, normally fates baselines are fates-<FATES TAG>-<CTSM TAG>)
derecho ----- OK
izumi ------- OK

If the tag used for baseline comparisons was NOT the previous tag, note that here:
izumi fates tested against `fates-sci.1.89.0_api.43.0.0-ctsm5.4.025`
derecho fates tested against `fates-sci.1.91.1_api.43.1.0-ctsm5.4.025`

Answer changes
--------------

Changes answers relative to baseline: Yes, fates only

Other details
-------------

List any git submodules updated (cime, rtm, mosart, cism, fates, etc.):
fates: sci.1.89.0_api.43.0.0 -> sci.1.91.1_api.43.1.0

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

https://github.com/ESCOMP/CTSM/pull/3760
https://github.com/NGEET/fates/pull/1536

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