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Sci Rep

Title:		Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols
Author(s):		Kourtchev I; Giorio C; Manninen A; Wilson E; Mahon B; Aalto J; Kajos M; Venables D; Ruuskanen T; Levula J; Loponen M; Connors S; Harris N; Zhao D; Kiendler-Scharr A; Mentel T; Rudich Y; Hallquist M; Doussin JF; Maenhaut W; Back J; Petaja T; Wenger J; Kulmala M; Kalberer M;
Address:		"Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK. Department of Chemistry and Environmental Research Institute, University College Cork, Cork, Ireland. Department of Physics, University of Helsinki, P.O. Box 64, 00014, University of Helsinki, Helsinki, Finland. Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland. Hyytiala Forestry Field Station, Hyytialantie 124, Korkeakoski, 35500, Finland. Leibniz Institute for Tropospheric Research (TROPOS), Permoserstr. 15, 04318 Leipzig, Germany. Centre for Atmospheric Informatics and Emissions Technology, Cranfield University, Cranfield MK43 0AL, UK. Institut fur Energie- und Klimaforschung (IEK-8), Forschungszentrum Julich GmbH. Department of Earth and Planetary Sciences and Energy Research, Weizmann Institute, Rehovot 76100, Israel. Department of Chemistry, Atmospheric Science, University of Gothenburg, 412 96 Goteborg, Sweden. LISA, CNRS UMR 7583, Universites Paris-Est-Creteil et Paris-Diderot, Institut Pierre Simon Laplace, 61 Avenue du General de Gaulle, 94010, Creteil, France. Department of Analytical Chemistry, Ghent University, Krijgslaan 281, S12, 9000 Ghent, Belgium. Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium"
Journal Title:		Sci Rep
Year:		2016
Volume:		20161013
Issue:
Page Number:		35038 -
DOI:		10.1038/srep35038
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
Abstract:		"Secondary organic aerosol (SOA) accounts for a dominant fraction of the submicron atmospheric particle mass, but knowledge of the formation, composition and climate effects of SOA is incomplete and limits our understanding of overall aerosol effects in the atmosphere. Organic oligomers were discovered as dominant components in SOA over a decade ago in laboratory experiments and have since been proposed to play a dominant role in many aerosol processes. However, it remains unclear whether oligomers are relevant under ambient atmospheric conditions because they are often not clearly observed in field samples. Here we resolve this long-standing discrepancy by showing that elevated SOA mass is one of the key drivers of oligomer formation in the ambient atmosphere and laboratory experiments. We show for the first time that a specific organic compound class in aerosols, oligomers, is strongly correlated with cloud condensation nuclei (CCN) activities of SOA particles. These findings might have important implications for future climate scenarios where increased temperatures cause higher biogenic volatile organic compound (VOC) emissions, which in turn lead to higher SOA mass formation and significant changes in SOA composition. Such processes would need to be considered in climate models for a realistic representation of future aerosol-climate-biosphere feedbacks"
Keywords:
Notes:		"PubMed-not-MEDLINEKourtchev, Ivan Giorio, Chiara Manninen, Antti Wilson, Eoin Mahon, Brendan Aalto, Juho Kajos, Maija Venables, Dean Ruuskanen, Taina Levula, Janne Loponen, Matti Connors, Sarah Harris, Neil Zhao, Defeng Kiendler-Scharr, Astrid Mentel, Thomas Rudich, Yinon Hallquist, Mattias Doussin, Jean-Francois Maenhaut, Willy Back, Jaana Petaja, Tuukka Wenger, John Kulmala, Markku Kalberer, Markus eng 227463/ERC_/European Research Council/International Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2016/10/14 Sci Rep. 2016 Oct 13; 6:35038. doi: 10.1038/srep35038"