Support for Cloud-J version 8.0.0 #2424
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lizziel
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Attn: Chemistry WG
topic: Photolysis
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yantosca
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Aug 26, 2024
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Looks good @lizziel. I just have a couple of comments.
- We need a CHANGELOG.md update.
- There are several new fields in
geoschem_config.yml. We'll have to update thedocs/source/gcclassic-user-guide/geoschem_config.rstfile accordingly. But this can be done in the docs/dev branch later.
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@yantosca, changelog is now updated. I ran a 1-month benchmark comparison using latest dev/14.5.0. As expected, OH decreases and CH4 lifetime increases. J-values for O3(1D) decrease in the presence of moisture. Below is the 1-month zonal mean. |
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Besides options previously in input file CJ77.dat, there is now the option to turn off the UV absorption by water vapor. Signed-off-by: Lizzie Lundgren <[email protected]>
The concentration is computes from species concentration is H2O is a species. Otherwise it is computed from the specific humidity in the input meteorology. Signed-off-by: Lizzie Lundgren <[email protected]>
This update also moves all Cloud-J parameters set in geoschem_config.yml to new sub-menu called cloud-j within the photolysis menu. Signed-off-by: Lizzie Lundgren <[email protected]>
Signed-off-by: Lizzie Lundgren <[email protected]> # Conflicts: # CHANGELOG.md
Signed-off-by: Lizzie Lundgren <[email protected]>
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All GEOS-Chem Classic and GCHP integration tests passed. Please see the following links for details: |
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Name and Institution (Required)
Name: Lizzie Lundgren
Institution: Harvard University
Describe the update
This pull request brings in updates for compatibility with Cloud-J version 8.0.0. The primary change is expanding the photolysis menu in configuration file
geoschem_config.ymlto allow easy run-time configuration of Cloud-J from GEOS-Chem run directories. Previously these settings were configured in an input file stored in external data directories.Also in this update is the inclusion of the option to turn off the UV absorption by water vapor. H2O UV absorption is the main update in Cloud-J v8 and some GEOS-Chem users may want to experiment with it. It is turned on by default but can be toggled off in the photolysis menu of
geoschem_config.yml.This PR requires updating the Cloud-J submodule at the same time as merge. The Cloud-J PR that accompanies this PR is geoschem/Cloud-J#24.
Expected changes
We expect the mean OH will decrease and CH4 lifetime will increase due to the absorption of UV by H2O. If the UV absorption is turned off then this becomes a no diff update relative to Cloud-J 7.7.
Reference(s)
Prather, Michael (2023). An updated cloud-overlap photolysis module for atmospheric chemistry models, UCI Cloud-J v8.0, with near-UV H2O absorption [Dataset]. Dryad. https://doi.org/10.7280/D1Q398
Related Github Issues
geoschem/Cloud-J#12
closes #2386