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Composition and volatility of secondary organic aerosol (SOA) formed from oxidation of real tree emissions compared to simplified volatile organic compound (VOC) systems

Ylisirniö, Arttu; Buchholz, Angela; Mohr, Claudia; Li, Zijun; Barreira, Luis; Lambe, Andrew; Faiola, Celia; Kari, Eetu; Yli-Juuti, Taina; Nizkorodov, Sergey A.; Worsnop, Douglas R.; Virtanen, Annele; Schobesberger, Siegfried

Abstract:
Secondary organic aerosol (SOA) is an important constituent of the atmosphere where SOA particles are formed chiefly by the condensation or reactive uptake of oxidation products of volatile organic compounds (VOCs). The mass yield in SOA particle formation, as well as the chemical composition and volatility of the particles, is determined by the identity of the VOC precursor(s) and the oxidation conditions they experience. In this study, we used an oxidation flow reactor to generate biogenic SOA from the oxidation of Scots pine emissions. Mass yields, chemical composition and volatility of the SOA particles were characterized and compared with SOA particles formed from oxidation of α-pinene and from a mixture of acyclic–monocyclic sesquiterpenes (farnesenes and bisabolenes), which are significant components of the Scots pine emissions. SOA mass yields for Scots pine emissions dominated by farnesenes were lower than for α-pinene but higher than for the artificial mixture of farnesenes and bisabolenes. The reduction in the SOA yield in the farnesene- and bisabolene-dominated mixtures is due to exocyclic C=C bond scission in these acyclic–monocyclic sesquiterpenes during ozonolysis leading to smaller and generally more volatile products. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000120267
Veröffentlicht am 18.06.2020
Originalveröffentlichung
DOI: 10.5194/acp-20-5629-2020
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Aerosolforschung (IMK-AAF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000120267
Erschienen in Atmospheric chemistry and physics
Band 20
Heft 9
Seiten 5629–5644
Vorab online veröffentlicht am 13.05.2020
Nachgewiesen in Web of Science
Scopus
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