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| Titel |
The role of sulphates and organic vapours in growth of newly formed particles in a eucalypt forest |
| VerfasserIn |
Z. D. Ristovski, T. Suni, M. Kulmala  , M. Boy, N. K. Meyer, J. Duplissy, A. Turnipseed, L. Morawska, U. Baltensperger |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 6 ; Nr. 10, no. 6 (2010-03-29), S.2919-2926 |
| Datensatznummer |
250008264
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| Publikation (Nr.) |
 copernicus.org/acp-10-2919-2010.pdf |
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| Zusammenfassung |
| The influence of biogenic particle formation on climate is a well recognised
phenomenon. To understand the mechanisms underlying the biogenic particle
formation, determining the chemical composition of the new particles and
therefore the species that drive the particle production is of utmost
importance. Due to the very small amount of mass involved, indirect
approaches are frequently used to infer the composition. We present here the
results of such an indirect approach by simultaneously measuring volatile and
hygroscopic properties of newly formed particles in a forest environment. It is shown
that the particles are composed of both sulphates and organics, with the
amount of sulphate component strongly depending on the available gas-phase
sulphuric acid, and the organic components having the same volatility and hygroscopicity
as photo-oxidation products of a monoterpene such as α-pinene.
Our findings agree with a two-step process through
nucleation and cluster formation followed by simultaneous growth by
condensation of sulphates and organics that take the particles to
climatically relevant sizes. |
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