Add INTERFACE_FILTER_DT_BUG #850
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Having read through these proposed changes, I am convinced that they are correct, but I think that before merging this in I would like to see whether @theresa-cordero agrees.
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I agree, this bug fix makes sense. |
Hallberg-NOAA
approved these changes
Mar 10, 2025
In non-Boussinesq mode, calc_derived_thermo needs to be called before diag_update_remap_grids. Commit 23b2049 appears to require an extra call. Without the call, MOM6 issues a FATAL error message.
A new parameter, INTERFACE_FILTER_DT_BUG, is added to fix two bugs in the time interval passed to interface_filter and to thickness_diffuse. This parameter has no effect, and is not read or logged, when THICKNESSDIFFUSE_FIRST is true and DT_TRACER_ADVECT = DT_THERMO or when both THICKNESSDIFFUSE_FIRST and APPLY_INTERFACE_FILTER are false. Its default is false which will change answers in the rare existing cases with the bug. In such cases, the original answers can be restored by setting INTERFACE_FILTER_DT_BUG to true.
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This PR has passed pipeline testing at https://gitlab.gfdl.noaa.gov/ogrp/mom6ci/MOM6/-/pipelines/26699 with the expected warnings about a new runtime parameter and the reordering of some existing parameters in the MOM_parameter_doc files. |
This was referenced Apr 23, 2025
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A new parameter, INTERFACE_FILTER_DT_BUG, is added to fix two bugs in
the time interval passed to interface_filter and to thickness_diffuse.
This parameter has no effect, and is not read or logged, when
THICKNESSDIFFUSE_FIRST is true and DT_TRACER_ADVECT = DT_THERMO or
when both THICKNESSDIFFUSE_FIRST and APPLY_INTERFACE_FILTER are false.
Its default is false which will change answers in the rare existing cases
with the bug. In such cases, the original answers can be restored by
setting INTERFACE_FILTER_DT_BUG to true.
In addition, a missing calc_derived_thermo call has been added:
In non-Boussinesq mode, calc_derived_thermo needs to be called before
diag_update_remap_grids. Commit 23b2049 appears to require an extra call.
Without the call, MOM6 issues a FATAL error message.