Table 1. Representation of Secondary Organic Aerosol Formation in Regional and Global Models Source Hydrocarbons Considered Gas Aerosol Partitioning Regions Simulated Chung and Seinfeld [2002] 14 terpenes two product model global Derwent et al. [2003] alpha-pinene first order scavenging of condensable oxidation products global Tsigaridis and Kanakidou [2003] alpha and beta-pinene toluene and xylene two product model global Lack et al. [2004] biogenic C10H16 and anthropogenic C4H10 bulk yield and two product model global Bonn et al. [2004] alpha-pinene aerosol forms when saturation vapor pressure of species is exceeded global Tsigaridis et al. [2005] alpha and beta-pinene, toluene, xylene, and isoprene two product model global Henze and Seinfeld [2006] 14 terpenes isoprene two product model global Andersson Sköld and Simpson [2001] alpha-pinene two product model northern Europe Griffin et al. [2002] aromatics, terpenes explicit organic chemistry southern California Heald et al. [2005] 14 terpenes two product model northwestern Pacific Ocean This work 14 terpenes, isoprene two product model United States