Organic Aerosol Simulations Using WRF-CHEM model in Mexico City during MCMA-2006/Milagro Campaign

In the present study, the organic aerosols in the Mexico City Metropolitan Area (MCMA) during MCMA-2006/Milagro Campaign are simulated using the WRF-CHEM model with two different approaches: 1) Traditional 2-product secondary organic aerosol (SOA) model with non-volatile primary organic aerosols (POA); 2) the volatility basis-set modeling approach in which both primary and secondary organic components are assumed to be semivolatile and photochemically reactive and are distributed in logarithmically spaced volatility bins. Comparison of the two model results with observations will be presented.