ctsm5.4.012

[CTSM Gatekeeper]

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Tag name: ctsm5.4.012
Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310)
Date: Mon Jan 26 03:13:02 PM MST 2026
One-line Summary: Fix C-balance error for partly emerged crops

Purpose and description of changes
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In CNPhenology, to the section "plant had emerged before harvest" I added a subsection "plant partly emerged from the ground" that repeats the code from the "else" section just after that's labeled "plant never emerged from the ground."

Significant changes to scientifically-supported configurations
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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


Bugs fixed
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List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:
Fixes #3678

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

Answer changes
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Changes answers relative to baseline: Yes

- Configurations: Four BASELINE tests show DIFFs. Three derecho_intel, one izumi_nag, all four I2000Clm60BgcCrop:
ERP_P64x2_Ld765.f10_f10_mg37.I2000Clm60BgcCrop.derecho_intel.clm-monthly BASELINE ctsm5.4.011: DIFF
ERS_Ly3.f10_f10_mg37.I2000Clm60BgcCrop.derecho_intel BASELINE ctsm5.4.011: DIFF
SMS_Ly2_PS.f19_g17.I2000Clm60BgcCrop.derecho_intel.clm-cropMonthOutput BASELINE ctsm5.4.011: DIFF
SMS_D_Ld65.f10_f10_mg37.I2000Clm60BgcCrop.izumi_nag.clm-FireLi2024GSWP BASELINE ctsm5.4.011: DIFF
- Nature of change: Potentially larger than roundoff (certainly in B-cases) but same climate and rare.

Other details
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Pull Requests that document the changes (include PR ids):
https://github.com/ESCOMP/ctsm/pull/3702

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