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Proc Natl Acad Sci U S A

Title:		Monoterpenes are the largest source of summertime organic aerosol in the southeastern United States
Author(s):		Zhang H; Yee LD; Lee BH; Curtis MP; Worton DR; Isaacman-VanWertz G; Offenberg JH; Lewandowski M; Kleindienst TE; Beaver MR; Holder AL; Lonneman WA; Docherty KS; Jaoui M; Pye HOT; Hu W; Day DA; Campuzano-Jost P; Jimenez JL; Guo H; Weber RJ; de Gouw J; Koss AR; Edgerton ES; Brune W; Mohr C; Lopez-Hilfiker FD; Lutz A; Kreisberg NM; Spielman SR; Hering SV; Wilson KR; Thornton JA; Goldstein AH;
Address:		"Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720; haofei.zhang@ucr.edu ahg@berkeley.edu. Department of Chemistry, University of California, Riverside, CA 92521. Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720. Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195. Department of Earth and Planetary Science, University of California, Berkeley, CA 94720. Aerosol Dynamics Inc., Berkeley, CA 94710. National Exposure Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711. National Risk Management Laboratory, Office of Research and Development, US Environmental Protection, Agency, Research Triangle Park, NC 27711. Jacobs Technology, Inc., Research Triangle Park, NC 27711. Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80309. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332. National Oceanic and Atmospheric Administration Earth System Research Laboratory, Boulder, CO 80305. Atmospheric Research and Analysis, Cary, NC 27513. Department of Meteorology, Pennsylvania State University, University Park, PA 16802. Department of Chemistry and Molecular Biology, University of Gothenberg, SE-41296 Gothenberg, Sweden. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720. Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720"
Journal Title:		Proc Natl Acad Sci U S A
Year:		2018
Volume:		20180212
Issue:		9
Page Number:		2038 - 2043
DOI:		10.1073/pnas.1717513115
ISSN/ISBN:		1091-6490 (Electronic) 0027-8424 (Print) 0027-8424 (Linking)
Abstract:		"The chemical complexity of atmospheric organic aerosol (OA) has caused substantial uncertainties in understanding its origins and environmental impacts. Here, we provide constraints on OA origins through compositional characterization with molecular-level details. Our results suggest that secondary OA (SOA) from monoterpene oxidation accounts for approximately half of summertime fine OA in Centreville, AL, a forested area in the southeastern United States influenced by anthropogenic pollution. We find that different chemical processes involving nitrogen oxides, during days and nights, play a central role in determining the mass of monoterpene SOA produced. These findings elucidate the strong anthropogenic-biogenic interaction affecting ambient aerosol in the southeastern United States and point out the importance of reducing anthropogenic emissions, especially under a changing climate, where biogenic emissions will likely keep increasing"
Keywords:		Aerosols/*chemistry Air Pollutants/*chemistry Monoterpenes/*chemistry *Seasons Southeastern United States Time Factors aerosol source apportionment biogenic volatile organic compound oxidation nitrogen oxides;
Notes:		"MedlineZhang, Haofei Yee, Lindsay D Lee, Ben H Curtis, Michael P Worton, David R Isaacman-VanWertz, Gabriel Offenberg, John H Lewandowski, Michael Kleindienst, Tadeusz E Beaver, Melinda R Holder, Amara L Lonneman, William A Docherty, Kenneth S Jaoui, Mohammed Pye, Havala O T Hu, Weiwei Day, Douglas A Campuzano-Jost, Pedro Jimenez, Jose L Guo, Hongyu Weber, Rodney J de Gouw, Joost Koss, Abigail R Edgerton, Eric S Brune, William Mohr, Claudia Lopez-Hilfiker, Felipe D Lutz, Anna Kreisberg, Nathan M Spielman, Steve R Hering, Susanne V Wilson, Kevin R Thornton, Joel A Goldstein, Allen H eng Research Support, U.S. Gov't, Non-P.H.S. 2018/02/15 Proc Natl Acad Sci U S A. 2018 Feb 27; 115(9):2038-2043. doi: 10.1073/pnas.1717513115. Epub 2018 Feb 12"