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

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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
dc.contributor.authorRuuskanen, Taina
dc.contributor.authorLevula, Janne
dc.contributor.authorLoponen, Matti
dc.contributor.authorConnors, Sarah
dc.contributor.authorHarris, Neil R. P.
dc.contributor.authorZhao, Defeng
dc.contributor.authorKiendler-Scharr, Astrid
dc.contributor.authorMentel, Thomas
dc.contributor.authorRudich, Yinon
dc.contributor.authorHallquist, Mattias
dc.contributor.authorDoussin, Jean-Francois
dc.contributor.authorMaenhaut, Willy
dc.contributor.authorBack, Jaana
dc.contributor.authorPetaja, Tuukka
dc.contributor.authorWenger, John
dc.contributor.authorKulmala, Markku
dc.contributor.authorKalberer, Markus
dc.date.accessioned2016-12-15T09:37:08Z
dc.date.available2016-12-15T09:37:08Z
dc.date.issued2016-10-13
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_UK
dc.identifier.citationKourtchev I, Giorio C, Manninen A, et al, Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols. Scientific Reports Volume 6, 2016, Article number: 35038en_UK
dc.identifier.issn2045-2322
dc.identifier.urihttp://dx.doi.org/10.1038/srep35038
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/11159
dc.language.isoenen_UK
dc.publisherNatureen_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleEnhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosolsen_UK
dc.typeArticleen_UK

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