Model evidence for a significant source of secondary organic aerosol from isoprene

作者：van Donkelaar Aaron^*; Martin Randall V; Park Rokjin J; Heald Colette L; Fu Tzung May; Liao Hong; Guenther Alex

来源：Atmospheric Environment, 2007, 41(6): 1267-1274.

DOI：10.1016/j.atmosenv.2006.09.051

• isoprene
• secondary organic aerosol
• organic carbon

We investigate how a recently suggested pathway for production of secondary organic aerosol (SOA) affects the consistency of simulated organic aerosol (OA) mass in a global three-dimensional model of oxidant-aerosol chemistry (GEOS-Chem) versus surface measurements from the interagency monitoring of protected visual environments (IMPROVE) network. Simulations in which isoprene oxidation products contribute to SOA formation, with a yield of 2.0% by mass reduce a model bias versus measured OA surface mass concentrations. The resultant increase in simulated OA mass concentrations during summer of 0.6-1.0 mu g m(-3) in the southeastern United States reduces the regional RMSE to 0.88 mu g m(-3) from 1.26 mu g m(-3). Spring and fall biases are also reduced, with little change in winter when isoprene emissions are negligible.

• 出版日期2007-2
• 单位中国科学院大气物理研究所