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@slevis-lmwg slevis-lmwg commented Sep 8, 2025

Description of changes

See title.

Specific notes

Contributors other than yourself, if any:
@adamrher @whlipscomb @gunterl

CTSM Issues Fixed (include github issue #):
Resolves #3467

Are answers expected to change (and if so in what way)?
Yes, clm6 only.

Any User Interface Changes (namelist or namelist defaults changes)?
See title.

@slevis-lmwg slevis-lmwg self-assigned this Sep 8, 2025
@slevis-lmwg slevis-lmwg added science Enhancement to or bug impacting science non-bfb Changes answers (incl. adding tests) test: aux_clm Pass aux_clm suite before merging labels Sep 8, 2025
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slevis-lmwg commented Sep 8, 2025

./run_sys_tests -s aux_clm -c ctsm5.3.073 --skip-generate

  • izumi OK

./run_sys_tests -s aux_clm -c ctsm5.3.074 -g ctsm5.3.075

build-namelist_test OK

Update ctsm6 default paramfile and IC files

- Copied the new files to /inputdata and rimported them to the svn repository
- Updated namelist_defaults_ctsm.xml

 New paramfile lnd/clm2/paramdata/ctsm60_params_cal115_c250813.nc

 New finidat files in lnd/clm2/initdata_esmf/ctsm5.4:
 f19 2000 Bgc ctsm53065_54surfdata_PPEcal115_115_HIST.clm2.r.2000-01-01-00000.nc
 f19 1850 Bgc ctsm53065_54surfdata_PPEcal115_115_pSASU.clm2.r.0161-01-01-00000.nc

 ne30 1979 BgcCrop ctsm5.4_5.3.068_PPEcal115_116_HIST.clm2.r.1979-01-01-00000.nc
 ne30 2000 BgcCrop ctsm5.4_5.3.068_PPEcal115_116_HIST.clm2.r.2000-01-01-00000.nc
 ne30 2010 BgcCrop ctsm5.4_5.3.068_PPEcal115_116_HIST.clm2.r.2010-01-01-00000.nc
 ne30 1850 BgcCrop ctsm5.4_5.3.068_PPEcal115_116_pSASU.clm2.r.0161-01-01-00000.nc

 f09 1979 BgcCrop ctsm5.4_5.3.068_PPEcal115f09_118_HIST.clm2.r.1979-01-01-00000.nc
 f09 2000 BgcCrop ctsm5.4_5.3.068_PPEcal115f09_118_HIST.clm2.r.2000-01-01-00000.nc
 f09 2010 BgcCrop ctsm5.4_5.3.068_PPEcal115f09_118_HIST.clm2.r.2010-01-01-00000.nc
 f09 1850 BgcCrop ctsm5.4_5.3.068_PPEcal115f09_118_pSASU.clm2.r.0161-01-01-00000.nc

 f09 1850 Sp ctsm5.4_5.3.068_PPEcal115_SP_f09_121_1850.clm2.r.0041-01-01-00000.nc
 f09 2000 Sp ctsm5.4_5.3.068_PPEcal115_SP_f09_121_HIST.clm2.r.2000-01-01-00000.nc
 ne30 1850 Sp ctsm5.4_5.3.068_PPEcal115_SP_ne30_120_1850.clm2.r.0041-01-01-00000.nc
 ne30 2000 Sp ctsm5.4_5.3.068_PPEcal115_SP_ne30_120_HIST.clm2.r.2000-01-01-00000.nc

PR ESCOMP#3460
@slevis-lmwg slevis-lmwg requested a review from ekluzek September 9, 2025 18:54
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We just need to keep it the same for the older physics versions. And also add a comment about why we are doing this in the newer physics.

@slevis-lmwg slevis-lmwg changed the title ctsm5.3.075: Change default glcmec_downscale_longwave from true to false ctsm5.3.075: Change default glcmec_downscale_longwave from true to false for clm6 Sep 9, 2025
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Thanks for modifying, @slevis-lmwg

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Excellent, thanks for the update.

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Thank you both for the reviews and helpful comments.

@slevis-lmwg slevis-lmwg merged commit 2b375f9 into ESCOMP:master Sep 10, 2025
5 of 8 checks passed
@slevis-lmwg slevis-lmwg deleted the glcmec_dscale_lwave_false branch September 10, 2025 17:30
slevis-lmwg added a commit to slevis-lmwg/ctsm that referenced this pull request Sep 18, 2025
Change default glcmec_downscale_longwave from true to false for clm6

Changes answers for clm6 by changing glcmec_downscale_longwave to false.

PR ESCOMP#3475

slevis resolved conflicts:
bld/namelist_files/namelist_defaults_ctsm.xml
cime_config/testdefs/ExpectedTestFails.xml
ekluzek added a commit to ekluzek/CTSM that referenced this pull request Sep 22, 2025
Change default glcmec_downscale_longwave from true to false for clm6

Changes answers for clm6 by changing glcmec_downscale_longwave to false.

PR ESCOMP#3475
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non-bfb Changes answers (incl. adding tests) science Enhancement to or bug impacting science test: aux_clm Pass aux_clm suite before merging

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ctsm5.3.075: turn off LW downscaling over glacier elevation classes by default

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