ctsm5.4.024

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Tag name: ctsm5.4.024
Originator(s): erik (Erik Kluzek,UCAR/TSS,303-497-1326)
Date: Wed Mar 11 11:46:22 PM MDT 2026
One-line Summary: Update derecho_intel again and some fixes for it

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

Update to ccs_config1.0.77 with derecho_intel updates to intel/2024.3.2. And a two line fix to a continuation line in
the middle of a string, so that it will build.
Note, there are several mpi-serial Bgc cases that now fail on derecho_intel see details below.

Also update the parameter files to ones that have some new fields on it that will be moved from namelist to the parameter
file in a future b4b-dev PR.

Improve the logging about the ch4finundation stream. Some of this seemed to be important in order to be able to change
ch4finundationmapalo away from bilinear.

Remove a bunch of tests in the expected fail files that have been working now. Add a few more newly failing tests.

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


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

List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:
Fixes #3791 - one line change needed for intel/2025.3.2
Fixes #3795 - Update to ccs_config_cesm1.0.77

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

Caveats for users (e.g., need to interpolate initial conditions):

Some mpi-serial cases for single point cases with a Bgc compset fail because of a divide by zero in the ch4finundation mapping.
It fails with ch4finundatedmapalgo==bilinear but works if set to "nn" (see https://github.com/ESCOMP/CTSM/issues/3798)

Changes to the parameter file (output of tools/param_utils/compare_paramfiles):

./tools/param_utils/compare_paramfiles $CSMDATA/lnd/clm2/paramdata/ctsm60_params.c260204.no_nan_fill.nc $CSMDATA/lnd/clm2/paramdata/ctsm60_params.c260303.nc
File 0: /glade/campaign/cesm/cesmdata/inputdata/lnd/clm2/paramdata/ctsm60_params.c260204.no_nan_fill.nc
File 1: /glade/campaign/cesm/cesmdata/inputdata/lnd/clm2/paramdata/ctsm60_params.c260303.nc

Variable(s) present in File 1 but not File 0:
baseflow_scalar
precip_repartition_glc_all_rain_t
precip_repartition_glc_all_snow_t
precip_repartition_nonglc_all_rain_t
precip_repartition_nonglc_all_snow_t

Notes of particular relevance for developers:
---------------------------------------------
There are now more problems with the CN-Matrix threaded tests (see https://github.com/ESCOMP/CTSM/issues/2619)

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

[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

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


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

Changes answers relative to baseline: no bit-for-bit -- except the compiler update means derecho_intel changes answers

Summarize any changes to answers, i.e.,
- what code configurations: All
- what platforms/compilers: derecho_intel
- nature of change: should be roundoff (but haven't verified)

73 of the 280 passing tests on derecho_intel show different answers

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

List any git submodules updated (cime, rtm, mosart, cism, fates, etc.):
ccs_config to ccs_config_cesm1.0.77

Pull Requests that document the changes (include PR ids):
(https://github.com/ESCOMP/ctsm/pull)
#3796 -- Hot fix with updated derecho_intel and changes needed for it

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