I am using CMAQ v5.3 to simulate windblown dust and to estimate contribution of windblown dust to PM10. I noticed that PM10 calculation in the mechanism “cb6r3_ae7_aq” can be found in the file “SpecDef_cb6r3_ae7_aq.txt” as below:
!! PM10.0 and Coarse-Sized Species
PM10 ,ug m-3 ,ATOTI*PM10AT+ATOTJ*PM10AC+ATOTK*PM10CO
Anyone can explain this equation and tell me what those items mean.
Another question, does this PM10 calculation include SOIL and PM2.5? If yes, why PM10 concentration processed with the combine is very small and even less than ASOIL concentration in CCTM_ACOUN file based on my CMAQ runs during high wind days. It is definitely not what I want if I need to estimate contribution of windblown dust to PM10. Thank you very much in advance for your time to help and reply.
BTW, I already read Kristen Foley’s post at How do I compute PM2.5, PM10 or PM1 from CMAQ output?.