[FEATURE REQUEST] Make adding/changing meterology source a run-time option

[lizziel]

Name and Institution (Required)

Name: Lizzie Lundgren
Institution: Harvard University

New GCClassic feature or discussion

I am testing a new meteorology source in GC-Classic. In order to do this I need to change code in HEMCO and GEOS-Chem repositories and recompile. This is in addition to changing settings in geoschem_config.yml, HEMCO_Config.rc, and HEMCO_Config.rc.gmao_metfields, some of which are redundant. This is much more complicated than in GCHP which simply requires changing paths in ExtData.rc and rerunning.

I suggest that we take a look at how we handle meteorology inputs in GEOS-Chem Classic to see if we can make it a run-time option and with more flexibility and simplicity. I'll think about how to do this in preparation for adding GEOS-IT as a standard option in the model.