Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols

dc.contributor.authorKourtchev, Ivan
dc.contributor.authorGiorio, Chiara
dc.contributor.authorManninen, Antti
dc.contributor.authorWilson, Eoin
dc.contributor.authorMahon, Brendan
dc.contributor.authorAalto, Juho
dc.contributor.authorKajos, Maija
dc.contributor.authorVenables, Dean S.
dc.contributor.authorRuuskanen, Taina
dc.contributor.authorLevula, Janne
dc.contributor.authorLoponen, Matti
dc.contributor.authorConnors, Sarah
dc.contributor.authorHarris, Neil
dc.contributor.authorZhao, Defeng
dc.contributor.authorKiendler-Scharr, Astrid
dc.contributor.authorMentel, T. F.
dc.contributor.authorRudich, Yinon
dc.contributor.authorHallquist, Mattias
dc.contributor.authorDoussin, Jean-Francois
dc.contributor.authorMaenhaut, Willy
dc.contributor.authorBäck, Jaana
dc.contributor.authorPetäjä, Tuukka
dc.contributor.authorWenger, John C.
dc.contributor.authorKulmala, Markku
dc.contributor.authorKalberer, Markus
dc.contributor.funderSeventh Framework Programmeen
dc.contributor.funderEuropean Research Councilen
dc.contributor.funderSuomen Akatemiaen
dc.contributor.funderOffice of Scienceen
dc.contributor.funderU.S. Department of Energyen
dc.contributor.funderHorizon 2020en
dc.contributor.funderNatural Environment Research Councilen
dc.description.abstractSecondary 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.en
dc.description.sponsorshipSuomen Akatemia (Grants 1118615 and 272041); U.S. Department of Energy, Office of Science (Biogenic Aerosols—Effects on Clouds and Climate (BAECC)); Natural Environment Research Council, United Kingdom (Studentship)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.identifier.citationKOURTCHEV, 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, J.-F., MAENHAUT, W., BÄCK, J., PETÄJÄ, T., WENGER, J., KULMALA, M. & KALBERER, M. (2016) 'Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols', Scientific Reports, 6, 35038 (9pp). doi:10.1038/srep35038en
dc.identifier.journaltitleScientific Reportsen
dc.publisherNature Publishing Groupen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/254319/EU/Determination of Elemental Composition of Secondary Organic Aerosols using Ultrahigh Resolution Mass Spectrometry: A Combined Laboratory and Field Investigation/SOAULTRAMASSen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP2::ERC/279405/EU/Composition and Sources of Atmospheric Organic Aerosol and their Negative Health Effects/CORANEen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP2::ERC/227463/EU/Atmospheric nucleation: from molecular to global scale/ATMNUCLEen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP4::INFRA/228335/EU/Integration of European Simulation Chambers for Investigating Atmospheric Processes - Part 2/EUROCHAMP-2en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020/654109/EU/Aerosols, Clouds, and Trace gases Research InfraStructure/ACTRIS-2en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP4::INFRA/262254/EU/Aerosols, Clouds, and Trace gases Research Infrastructure Network/ACTRISen
dc.rights© 2016, the Authors. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line.en
dc.subjectSecondary organic aerosolen
dc.subjectOrganic oligomersen
dc.subjectCloud condensation nucleien
dc.subjectVolatile organic compounden
dc.titleEnhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosolsen
dc.typeArticle (peer-reviewed)en
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