ctsm5.3.082

[CTSM Gatekeeper]

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Tag name: ctsm5.3.082
Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310)
Date: Fri 24 Oct 2025 11:17:41 AM MDT
One-line Summary: Update to CMIP7 population density file for non-SSP cases

Purpose and description of changes
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Update two lines in namelist_defaults_ctsm.xml.

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]:
Resolves #3545 Update to official CMIP7 pop. density data

Notes of particular relevance for users
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Changes made to namelist defaults (e.g., changed parameter values):
Updated pop. density file for non-SSP cases.

Changes to the datasets (e.g., parameter, surface or initial files):
Updated pop. density file for non-SSP cases.

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

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

Changes answers relative to baseline: Yes

Summarize any changes to answers, i.e.,
- what code configurations: non-SSP
- what platforms/compilers: all
- nature of change: larger than roundoff/same climate

Other details
-------------
Pull Requests that document the changes (include PR ids):
https://github.com/ESCOMP/ctsm/pull/3563

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