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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I'm new to using GEOS-Chem and have encountered some issues during actual operation.
I ran simulations by combining fullchemistry with CH4 chemistry. First, I obtained SpeciesConcVV_OH and OHconcAfterChem from the full-chemistry run. In the metrics.py script, I used the LossOHbyCH4columnTrop variable to calculate CH4 lifetime. I'm curious to know if the OH referenced in LossOHbyCH4columnTrop corresponds to SpeciesConcVV_OH, OHconcAfterChem, or another variable?
In fullchem_mod.F90, I found that LossOHbyCH4 = LossOHbyCH4 + ( Ktrop OHconc_mcm3 airMass_m ), where OHconc_mcm3 = State_Chm%Species(id_OH)%Conc(I,J,L). However, I'm not sure which OH variable in which file State_Chm%Species(id_OH)%Conc(I,J,L) refers to.
Additionally, when I use SpeciesConcVV_OH from the fullchemistry simulation as input for CH4 chemistry, should I look at OHconcAfterChem for the OH output? Interestingly, I’ve noticed that OHconcAfterChem values are higher than either SpeciesConcVV_OH or OHconcAfterChem obtained in full-chemistry. Could you help me understand where I might have gone wrong?
Your help would be greatly appreciated! Thank you so much!
Your name
fangjiong
Your affiliation
shanghai university
Please provide a clear and concise description of your question or discussion topic.
I'm new to using GEOS-Chem and have encountered some issues during actual operation. I ran simulations by combining fullchemistry with CH4 chemistry. First, I obtained SpeciesConcVV_OH and OHconcAfterChem from the full-chemistry run. In the metrics.py script, I used the LossOHbyCH4columnTrop variable to calculate CH4 lifetime. I'm curious to know if the OH referenced in LossOHbyCH4columnTrop corresponds to SpeciesConcVV_OH, OHconcAfterChem, or another variable?
In fullchem_mod.F90, I found that LossOHbyCH4 = LossOHbyCH4 + ( Ktrop OHconc_mcm3 airMass_m ), where OHconc_mcm3 = State_Chm%Species(id_OH)%Conc(I,J,L). However, I'm not sure which OH variable in which file State_Chm%Species(id_OH)%Conc(I,J,L) refers to.
Additionally, when I use SpeciesConcVV_OH from the fullchemistry simulation as input for CH4 chemistry, should I look at OHconcAfterChem for the OH output? Interestingly, I’ve noticed that OHconcAfterChem values are higher than either SpeciesConcVV_OH or OHconcAfterChem obtained in full-chemistry. Could you help me understand where I might have gone wrong?
Your help would be greatly appreciated! Thank you so much!