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Nat Commun

Title:		Non-linear effects of secondary organic aerosol formation and properties in multi-precursor systems
Author(s):		Takeuchi M; Berkemeier T; Eris G; Ng NL;
Address:		"School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. ng@chbe.gatech.edu. School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. ng@chbe.gatech.edu. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA. ng@chbe.gatech.edu"
Journal Title:		Nat Commun
Year:		2022
Volume:		20221222
Issue:		1
Page Number:		7883 -
DOI:		10.1038/s41467-022-35546-1
ISSN/ISBN:		2041-1723 (Electronic) 2041-1723 (Linking)
Abstract:		"Secondary organic aerosol (SOA) contributes significantly to ambient fine particulate matter that affects climate and human health. Monoterpenes represent an important class of biogenic volatile organic compounds (VOCs) and their oxidation by nitrate radicals poses a substantial source of SOA globally. Here, we investigate the formation and properties of SOA from nitrate radical oxidation of two common monoterpenes, alpha-pinene and limonene. When two monoterpenes are oxidized simultaneously, we observe a ~50% enhancement in the formation of SOA from alpha-pinene and a ~20% reduction in limonene SOA formation. The change in SOA yields is accompanied by pronounced changes in aerosol chemical composition and volatility. These non-linear effects are not observed in a sequential oxidation experiment. Our results highlight that unlike currently assumed in atmospheric models, the interaction of products formed from individual VOCs should be accounted for to accurately describe SOA formation and its climate and health impacts"
Keywords:		Humans Limonene Nitrates/chemistry *Air Pollutants Monoterpenes/chemistry Particulate Matter *Volatile Organic Compounds Aerosols/chemistry;
Notes:		"MedlineTakeuchi, Masayuki Berkemeier, Thomas Eris, Gamze Ng, Nga Lee eng Research Support, U.S. Gov't, Non-P.H.S. England 2022/12/23 Nat Commun. 2022 Dec 22; 13(1):7883. doi: 10.1038/s41467-022-35546-1"