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MYNN fix for numerical stability issues with mixing snow #71

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merged 8 commits into from
Jun 12, 2023

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joeolson42
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This is simply a removal of the snow mixing, reverting back to the RRFS Base E configuration. For some unknown reason, mixing snow was contributing to numerical instabilities. The ultimate cause of this instability will be investigated in the future but for now, snow mixing is deactivated.

There is also a small change to table values of Leaf Area Index to match them better with the LAI monthly climatology that is used in HRRR.

@grantfirl
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grantfirl commented May 19, 2023

@joeolson42 John Michalakes, working with NEPTUNE, came across a Cray compiler error in module_bl_mynn that is an easy fix. Is this critical to be merged as-is, or can I make the small changes and combine them in this PR?

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grantfirl commented May 19, 2023

@joeolson42 @michalakes Please see joeolson42#3 to address the issue reported by @michalakes: #72. It looks like one of the offending lines was already fixed in #43, but I fixed the other two.

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fixes #72 if joeolson42#3 is merged

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joeolson42 commented May 19, 2023 via email

@joeolson42 joeolson42 requested a review from mzhangw as a code owner May 19, 2023 16:37
@zach1221
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All tests are finished on UFS-WM PR #1754. As this PR is approved, @grantfirl could you please go ahead and merge?

@grantfirl grantfirl merged commit 90c7089 into ufs-community:ufs/dev Jun 12, 2023
drnimbusrain pushed a commit to noaa-oar-arl/ccpp-physics that referenced this pull request Mar 28, 2024
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6 participants