Effects of anthropogenic emissions on aerosol formation from isoprene and monoterpenes in the southeastern United States.

ABSTRACT: Secondary organic aerosol (SOA) constitutes a substantial fraction of fine particulate matter and has important impacts on climate and human health. The extent to which human activities alter SOA formation from biogenic emissions in the atmosphere is largely undetermined. Here, we present direct observational evidence on the magnitude of anthropogenic influence on biogenic SOA formation based on comprehensive ambient measurements in the southeastern United States (US). Multiple high-time-resolution mass spectrometry organic aerosol measurements were made during different seasons at various locations, including urban and rural sites in the greater Atlanta area and Centreville in rural Alabama. Our results provide a quantitative understanding of the roles of anthropogenic SO2 and NOx in ambi

SUBMITTER: Xu L 

PROVIDER: S-EPMC4291623 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature