In Noah-MP, set zero for canopy liquid and canopy ice over glacier #2723
Conversation
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Combined the modification for snow glacier in "module_sf_noahmp_glacier.F90" from Mike Barlage. |
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Further updated the glacier variables related to the canopy and set all the undefined over the glacier to some values suggested by Mike Barlage. Performed some regression tests ( with Gaussian_grid and cubed_sphere_grid, separately ) for two sensitivity runs: a) setting all the "undefined" over glacier to some values, and b) modification of the snow glacier ( "module_sf_noahmp_glacier.F90" ) plus a) changes. |
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@wzzheng90 It looks like you deleted the pull request template when you put in your description. UFS code managers need to see/know the information contained in the template. Can you please put the template information back, fill it out, and only paste your description in the "Description" section of the template? Same goes for NOAA-EMC/ufsatm#960. The pull request templates are very important for the code managers. |
…canopy ice over glacier
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@jkbk2004 @grantfirl @JessicaMeixner-NOAA @RuiyuSun This PR is ready. |
Thanks @rhaesung @wzzheng90 I'm assuming that there will be an associated PR into https://github.com/NOAA-EMC/noahmp? Also, are all the failed tests in test_changes.list expected? It looks like every test that uses NOAH-mp should have different results, correct? |
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@grantfirl Yes, these changes in Noah-MP should have different results. |
@grantfirl Yes, we’re aware of this. @wzzheng90, as Grant suggested, we ultimately need an associated PR submitted to https://github.com/NOAA-EMC/noahmp. |
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@rhaesung Thanks. Please let me know when we create a PR submitted to https://github.com/NOAA-EMC/noahmp. |
@wzzheng90 Sure. When you have time, we can go ahead and start working on this PR together. |
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@wzzheng90 @rhaesung I don't think that it is necessarily required to have the noahmp PR attached to this one if there is time pressure, as long as it gets done at some point. That is, unless noahmp is being called as a component in GFS v17 or something. |
@grantfirl I agree — this isn’t urgent. Thanks for the clarification! @wzzheng90 We can proceed without attaching the NoahMP PR for now, as long as it's addressed later. |
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@grantfirl @rhaesung Sounds good. Thanks for your comments. |
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Reported failed RRFS tests. Please hold off on this PR for now. |
…due to the floating point exception and we will revisit them later
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We've decided to skip the RRFS tests - see #2759 for details. This should now be ready with the newly disabled tests (cc9353c). @yangfanglin @wzzheng90 @barlage @RuiyuSun @JessicaMeixner-NOAA @grantfirl @jkbk2004 |
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@wzzheng90 can you sync up branches? |
@jkbk2004 Done. Please check if they are correct. Thanks! |
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#2739 has been merged. This PR is next in queue, @wzzheng90 please sync up all branches and resolve conflicts, thank you. |
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Noting that hera saw these failures not within test_changes: @wzzheng90 are the updates in this pull request expecting changes to these tests? We can add them to test_changes for logging, but we need verification from your side that these are expected. |
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@FernandoAndrade-NOAA Just to confirm, the additional tests in your list ran to completion, but did not pass baselines? |
@FernandoAndrade-NOAA I think yes, but I have to double check these tests. Could you please inform me where to find these failures that Hera saw? Which output files? |
Correct, the test runs themselves seem fine.
Please refer to |
@FernandoAndrade-NOAA Thank you very much for providing information! I check all runs on the list (except for two runs are not available: cpld_restart_gfsv17_nowav_iau_intel; cpld_restart_c48_5deg_intel), and this PR changes results in these tests. |
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The documentation update has already been merged. Please update the PR title. |
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@wzzheng90 can you sync up branch one more time, https://github.com/wzzheng90/ufs-weather-model/tree/canopywater_glacier? |
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Ok we should be all set with testing, leaving a note in subcomponents to continue with their merge process. Derecho will be skipped due to system maintenance. |
Commit Queue Requirements:
Description:
This PR addresses the issue Fixes NCAR/ccpp-physics#272: ufs-community/ccpp-physics#272.
Failure of some UFS prototypes (e.g., GEFS) results from the "bad" canopy water used by the Noah-MP land surface model. In fact, canopy water is sum of canopy liquid and canopy ice in the Noah-MP, which is available only at the vegetation grids and there is no canopy variable at the glacier grids. Therefore, it doesn't really matter what canopy variables including canopy water are at initial time or at the forecast time over the glacier, so canopy liquid or canopy ice is set with a missing values (9.99e20_kind_phys).
However, some other processes such as UFS cold starts, outputs, restart and CHGRES steps, sometimes do not exclude 'glacier fraction' when processing canopy variables, and assign unrealistically canopy values over non-glacier points.
As one of options, set canopy liquid=0.0 and canopy ice=0.0 in Noah-MP, so that it avoids failure of some UFS prototypes (e.g., GEFS) results from the "bad" canopy water used by the Noah-MP land surface model.
Further updated:
a) Set all the related canopy "undefined" over the glacier to some values;
b) Modified snow glacier calculation in Noah-MP.
Performed some regression tests ( with Gaussian_grid and cubed_sphere_grid, separately ) for two sensitivity runs: a) setting all the "undefined" over glacier to some values, and b) modification of the snow glacier ( "module_sf_noahmp_glacier.F90" ) plus a) changes.
The a) run has no impacts at the non-glacier grids which we expected, while the b) run indicates some small changes of simulation. Several slides (PPT) are attached.
After completing the full Intel+GNU RT suite suite tests, it is found that two RRFS tests failed to run due to the division to zero causing floating point exception: both rrfs_v1beta_debug tests for Intel and GNU
We need to fix these tests later after identifying the causes. We now comment out both rrfs_v1beta_debug tests for Intel and GNU in 'rt.conf', and skip these two tests for now. We'll revisit them later.
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