As far as I know, the CMAQ process analysis explains the tendency of concentration with respect to each process (VDIF, CLD and etc.). These tendencies do not only rely on the rate of each process but also on underlying concentrations. For example, if two different emissions are used with the same meteorological fields, we will see a difference in VDIF resulting from two different values for that specific compound. This will obscure the realistic portrayal of each subprocess before considering the level of compounds. I should note that I’m using CMAQ v5.2 right now. Does the new version (or will the future version) include the magnitude of physical/chemical processes instead of fluxes?