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Evolution of Organic Aerosols in the Atmosphere
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2009 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 326, no 5959, 1525-1529 p.Article in journal (Refereed) Published
Abstract [en]

Organic aerosol (OA) particles affect climate forcing and human health, but their sources and evolution remain poorly characterized. We present a unifying model framework describing the atmospheric evolution of OA that is constrained by high-time-resolution measurements of its composition, volatility, and oxidation state. OA and OA precursor gases evolve by becoming increasingly oxidized, less volatile, and more hygroscopic, leading to the formation of oxygenated organic aerosol (OOA), with concentrations comparable to those of sulfate aerosol throughout the Northern Hemisphere. Our model framework captures the dynamic aging behavior observed in both the atmosphere and laboratory: It can serve as a basis for improving parameterizations in regional and global models.

Place, publisher, year, edition, pages
2009. Vol. 326, no 5959, 1525-1529 p.
Keyword [en]
secondary, mass, emissions, pittsburgh, chemistry, oxidation, campaign, growth, model
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-59416DOI: 10.1126/science.1180353ISI: 000272623600055OAI: oai:DiVA.org:su-59416DiVA: diva2:427150
Note
authorCount :64Available from: 2011-06-27 Created: 2011-06-27 Last updated: 2017-12-11Bibliographically approved

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Kulmala, Markku
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Department of Applied Environmental Science (ITM)
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