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Molecular identification of organic vapors driving atmospheric nanoparticle growth
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry.ORCID iD: 0000-0002-3291-9295
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Number of Authors: 122019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 4442Article in journal (Refereed) Published
Abstract [en]

Particles formed in the atmosphere via nucleation provide about half the number of atmospheric cloud condensation nuclei, but in many locations, this process is limited by the growth of the newly formed particles. That growth is often via condensation of organic vapors. Identification of these vapors and their sources is thus fundamental for simulating changes to aerosol-cloud interactions, which are one of the most uncertain aspects of anthropogenic climate forcing. Here we present direct molecular-level observations of a distribution of organic vapors in a forested environment that can explain simultaneously observed atmospheric nanoparticle growth from 3 to 50 nm. Furthermore, the volatility distribution of these vapors is sufficient to explain nanoparticle growth without invoking particle-phase processes. The agreement between observed mass growth, and the growth predicted from the observed mass of condensing vapors in a forested environment thus represents an important step forward in the characterization of atmospheric particle growth.

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2019. Vol. 10, article id 4442
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Physical Sciences Chemical Sciences Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-175699DOI: 10.1038/s41467-019-12473-2ISI: 000488235000012PubMedID: 31570718OAI: oai:DiVA.org:su-175699DiVA, id: diva2:1369984
Available from: 2019-11-13 Created: 2019-11-13 Last updated: 2019-12-09Bibliographically approved

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Mohr, ClaudiaRiipinen, IlonaDonahue, Neil M.
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