Anthropogenic enhancements to production of highly oxygenated molecules from autoxidation.

ABSTRACT: Atmospheric oxidation of natural and anthropogenic volatile organic compounds (VOCs) leads to secondary organic aerosol (SOA), which constitutes a major and often dominant component of atmospheric fine particulate matter (PM_2.5). Recent work demonstrates that rapid autoxidation of organic peroxy radicals (RO₂) formed during VOC oxidation results in highly oxygenated organic molecules (HOM) that efficiently form SOA. As NO_x emissions decrease, the chemical regime of the atmosphere changes to one in which RO₂ autoxidation becomes increasingly important, potentially increasing PM_2.5, while oxidant availability driving RO₂ formation rates simultaneously declines, possibly slowing regional PM_2.5 formation. Using a suit

SUBMITTER: Pye HOT 

PROVIDER: S-EPMC6452672 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature