Can CMAQ simulate the further impact of aerosols on O3 through their impact on photolysis?

[lizadams]

This post may describe a method that you can use.

Running CMAQ 5.2.1 without aerosol species

Hi there, I am trying to run a case with only biogenic emissions using CMAQ5.2.1. We generate biogenic emissions using MEGAN3.0, which include many gas-phase species, but no aerosol species. This seems to be a problem, because I get the error shown below. Value for CTM_ZERO_PCSOA not defined;returning default: FALSE >>--->> WARNING in subroutine AERO_EMIS_INIT on PE 014 Cannot define index for SO4 emissions: aerospc%emis=' ' in AERO_DATA.F. Check if AE namelist is …