Modeling of Organic Aerosol in Seoul Using CMAQ with AERO7

The Community Multiscale Air Quality (CMAQ) model with the 7th generation aerosol module (AERO7) was employed to simulate organic (OA) in Seoul, Korea, for year 2016. goal of present study includes 1-year simulation OA using WRF-CMAQ recently EPA-developed AERO7 pcVOC (potential VOC from combustion) scale factor revision and analysis seasonal behavior surrogate species Seoul. AERO7, most recent version CMAQ model, a new secondary (SOA) species, pcSOA SOA combustion), resolve inherent under-prediction problem OA. classified into three groups: primary (POA), anthropogenic (ASOA), biogenic (BSOA). Each group further 6~15 individual according volatility oxygen content aging formation SOA. hourly emissions POA precursors were compiled fed successfully variations compositions ambient organic-matter organic-carbon ratios (OM/OC). showed that ASOA major groups cool months (from November March) while BSOA warm April October) simulated OM/OCs ranged 1.5~2.1 which agreed well AMS measurements Seoul May