Lagrangian Photochemical Modeling of Ozone Formation and Aerosol Evolution in Biomass Burning Plumes: Toward a Sub-grid Scale Parameterization

Biomass burning is a major source of atmospheric pollution. Rapid, complex photochemistry can lead to significant increases in the concentrations of ozone in some smoke plumes after less than an hour of aging (e.g., Goode et al., 2000; Hobbs et al., 2003; Yokelson et al., 2009), while in other, generally boreal, plumes only small changes are observed on short time scales (e.g., Alvarado et al., 2010). Being able to simulate this rapid chemical evolution is a critical part of forecasting the impact of fires on urban and regional air quality. The Aerosol Simulation Program (ASP) was developed to simulate the formation of ozone and secondary organic aerosol (SOA) within several African and North American plumes (Alvarado and Prinn, 2009). In this work, we discuss recent updates to the gas-phase chemistry and secondary organic aerosol (SOA) formation modules of ASP, and use this updated version (ASP v2.0) to simulate the chemical evolution of a