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Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors
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Number of Authors: 922018 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 4, no 12, article id eaau5363Article in journal (Refereed) Published
Abstract [en]

A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the atmosphere. Highly oxygenated organic molecules (HOMs), formed by oxidation of biogenic volatile organic compounds, are known to participate in particle formation and growth. However, it is not well understood how they interact with atmospheric pollutants, such as nitrogen oxides (NOx) and sulfur oxides (SOx) from fossil fuel combustion, as well as ammonia (NH3) from livestock and fertilizers. Here, we show how NOx suppresses particle formation, while HOMs, sulfuric acid, and NH3 have a synergistic enhancing effect on particle formation. We postulate a novel mechanism, involving HOMs, sulfuric acid, and ammonia, which is able to closely reproduce observations of particle formation and growth in daytime boreal forest and similar environments. The findings elucidate the complex interactions between biogenic and anthropogenic vapors in the atmospheric aerosol system.

Place, publisher, year, edition, pages
2018. Vol. 4, no 12, article id eaau5363
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Physical Sciences Chemical Sciences
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URN: urn:nbn:se:su:diva-165730DOI: 10.1126/sciadv.aau5363ISI: 000454369600029PubMedID: 30547087OAI: oai:DiVA.org:su-165730DiVA, id: diva2:1286300
Available from: 2019-02-06 Created: 2019-02-06 Last updated: 2019-02-06Bibliographically approved

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Lehtipalo, KatrianneDada, LubnaBianchi, FedericoWagner, RobertAhonen, Lauri R.Mazon, Stephany BuenrostroChen, DexianChen, XuemengGarmash, OlgaHe, XuchengHeikkinen, LiineKangasluoma, JuhaKirkby, JasperKontkanen, JenniNichman, LeonidPassananti, MonicaPetaja, TuukkaRissanen, Matti P.Sipila, MikkoTauber, ChristianVolkamer, RainerWagner, Andrea C.Zha, QiaozhiHansel, ArminRiipinen, IlonaVirtanen, Annele
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