Modeling the Current and Future Roles of Particulate Organic Nitrates in the Southeastern United States

• DOI: 10.1021/acs.est.5b03738
• Publication Date: 2015-11-06T18:53:40Z
• Authors: Havala O. T. Pye; Deborah J. Luecken; Lu Xu; Christopher M. Boyd; Nga L. Ng; Kirk R. Baker; Benjamin R. Ayres; Jesse O. Bash; Karsten Baumann; William P. L. Carter; Eric Edgerton; Juliane L. Fry; William T. Hutzell; Donna B. Schwede; Paul B. Shepson
• Keywords: Isoprene

Organic nitrates are an important aerosol constituent in locations where biogenic hydrocarbon emissions mix with anthropogenic NOx sources. While regional and global chemical transport models may include a representation of organic from monoterpene reactions nitrate radicals (the primary source particle-phase the Southeast United States), secondary (SOA) can underestimate yields. Furthermore, SOA parametrizations do not explicitly take into account compounds produced gas phase. In this work, we developed coupled system to describe formation subsequent aerosol-phase partitioning isoprene monoterpenes focus on States. The concentrations gas-phase were improved when particulate assumed undergo rapid (τ = 3 h) pseudohydrolysis resulting nitric acid nonvolatile aerosol. addition, up 60% less oxidized-oxygenated (LO-OOA) could be accounted for via mediated chemistry during Southern Oxidants Aerosol Study (SOAS). A 25% reduction nitrogen oxide (NO + NO2) was predicted cause 9% June 2013 SOAS conditions at Centreville, Alabama.