*+Revise non-Boussinesq find_coupling_coef calcs#373
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marshallward merged 2 commits intoNOAA-GFDL:dev/gfdlfrom Jun 8, 2023
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*+Revise non-Boussinesq find_coupling_coef calcs#373marshallward merged 2 commits intoNOAA-GFDL:dev/gfdlfrom
marshallward merged 2 commits intoNOAA-GFDL:dev/gfdlfrom
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Restructure one of the find_coupling_coef calculations to draw out the stress-magnitude terms, in preparation for future steps to reduce the dependency on the Boussinesq reference density. Using a value of VERT_FRICTION_ANSWER_DATE that is below 20230601 recovers the previous answers with non-Boussinesq test cases, but this is irrelevant for Boussinesq test cases. This updated code is mathematically equivalent to the previous expressions but it does change answers at roundoff in non-Boussinesq cases for recent answer dates. There are modifications to some comments in MOM_parameter_doc files.
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@@ Coverage Diff @@
## dev/gfdl #373 +/- ##
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Coverage 38.28% 38.29%
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Files 269 269
Lines 76018 76022 +4
Branches 13982 13983 +1
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+ Hits 29107 29109 +2
- Misses 41682 41684 +2
Partials 5229 5229
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Gaea regression: https://gitlab.gfdl.noaa.gov/ogrp/MOM6/-/pipelines/19434 ❌ (✔️) 🟡 As expected, answers have changed in the |
dhruvbalwada
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Jan 31, 2026
Updates the NUOPC cap to write the stochastic physics package's restart file in the run directory whenever using the Stochastic GM+E parameterization. When restarting, enables the stochastic physics package to read a restart file from a name/location other than the default. If the new MOM6 namelist parameter CESM_RESTFILE is True then it uses the mom6 restart filename but with .r_stoch. in place of .r.. If CESM_RESTFILE is False (default) it simply uses whatever the default restart file name is in the stochastic physics package. (Edit: This PR no longer uses the CESM_RESTFILE parameter. It just reads the restart file directly from the run directory.) A separate PR to ESCOMP/stochastic_physics updates that package to allow the restart file name to change from its default value, which was originally hard-coded. This partially addresses NOAA-GFDL#360. Changes will be needed in MOM_interface to make the whole thing work; specifically, we should always set CESM_RESTFILE = True in user_nl_mom, and when CONTINUE_RUN is true we need to modify the stochini parameter in the &nam_stochy section of input.nml to take the value .true.. This PR takes an alternate approach to NOAA-GFDL#373, which required the restart file name to be set in the stochastic physics namelist. I've closed NOAA-GFDL#373 in preference to this approach.
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Restructure one of the find_coupling_coef calculations to draw out the stress-magnitude terms, in preparation for future steps to reduce the dependency on the Boussinesq reference density. Using a value of VERT_FRICTION_ANSWER_DATE that is below 20230601 recovers the previous answers with non-Boussinesq test cases, but this is irrelevant for Boussinesq test cases. This updated code is mathematically equivalent to the previous expressions but it does change answers at roundoff in non-Boussinesq cases for recent answer dates. There are modifications to some comments in MOM_parameter_doc files.