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geoschem / geos-chem

GEOS-Chem "Science Codebase" repository. Contains GEOS-Chem science routines, run directory generation scripts, and interface code. This repository is used as a submodule within the GCClassic and GCHP wrappers, as well as in other modeling contexts (external ESMs).
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NO2 simulation in GEOS-Chem #2365

Closed helpyuan closed 2 months ago

helpyuan commented 2 months ago

Your name

liumy

Your affiliation

CAMS

Please provide a clear and concise description of your question or discussion topic.

Hi, all.

I am a beginner in NOx field and I have a confusion about the simulation of NOx in the HEMCO_Config.rc file in GEOS-Chem, which involves the allocation of NO and NO2.

As is well known, NOx=NO+NO2, so my question is as follows:

Does GEOS-Chem consider the rapid conversion of NO in the atmosphere to NO2 through photochemical processes?

If considered, taking the CEDS list as an example, GEOS-Chem converts all NOx in the original CEDS to NO (http://geoschemdata.wustl.edu/ExtData/HEMCO/CEDS/v2024-06/README), without considering NO2. Is this part of NO2 emissions simulated through chemical reactions in GEOS-Chem? Because I did not find the allocation of NO2 by CEDS in the HEMCO_Config.rc file (http://geoschemdata.wustl.edu/ExtData/HEMCO/CEDS/v2024-06/config/HEMCO_Config.rc). image

If not considered, taking the CEDS list as an example, do we need to divide NOx into two parts: NO and NO2, and then allocate NO and NO2 separately in the HEMCO.Config.rc file?

In addition, I have noticed that in some local lists (such as NEI2016, DICE), NO and NO2 are allocated separately, which is different from the CEDS in the HEMCO.Config.rc file. How should this be explained?

Looking forward to receiving your clarification!

yantosca commented 2 months ago

This is a duplicate of #2364. We will make comments on issue #2364 and close this issue.