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MEGAN extension is turned on by default in GCHP run directory #2319
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I would suggest that this happens to other configurations like GCClassic as well. See:
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This was originally done on purpose for the implementation of MOH in version 12.7 (see pull request #175 and commit 3e2a48f). From that commit message:
At that time, MOH was not included in the offline biogenic emissions so we still needed to call MEGAN to compute the emissions for just that species. MOH is now included in the offline biogenic VOC files (I'm not sure of the exact date of when that occurred) so I'm confirming that we no longer need to call MEGAN when offline biogenic emissions are used. |
A fix for this can go into |
Thanks @msulprizio for confirming. |
Your name
Bob Yantosca
Your affiliation
Harvard + GCST
What happened? What did you expect to happen?
The HEMCO MEGAN extension is turned on by default when creating a GCHP run directory. Found by @yuanjianz.
Offline biogenic emissions are recommended for standard full-chemistry GCHP simulations. Having both offline biogenic VOC and MEGAN turned on may double count some emissions.
What are the steps to reproduce the bug?
Created a GCHP run directory and look at the HEMCO_Config.rc
Please attach any relevant configuration and log files.
No response
What GEOS-Chem version were you using?
14.4.0
What environment were you running GEOS-Chem on?
Local cluster
What compiler and version were you using?
gcc10
Will you be addressing this bug yourself?
Yes
In what configuration were you running GEOS-Chem?
GCHP
What simulation were you running?
Full chemistry
As what resolution were you running GEOS-Chem?
14.4.0
What meterology fields did you use?
MERRA-2
Additional information
No response
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