Hi CMAQ users:
I am curious how CCTM is using the chemical mechanisms. I looked through the script “run_cctm.csh” (EPA’s open source code: https://github.com/USEPA/CMAQ/blob/5.2.1/CCTM/scripts/run_cctm.csh). It seems that only species lists (GC_$MECH.nml, AE_$MECH.nml, NR_$MECH.nml) and photolysis (CSQY_DATA_$MECH) are included in the script, while the reactions (RXNS_DATA_MODULE.F90 and RXN_FUNC_MODULE.F90) are not included.
Does anyone have time to solve my confusion?