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| Titel |
Hygroscopicity, CCN and volatility properties of submicron atmospheric aerosol in a boreal forest environment during the summer of 2010 |
| VerfasserIn |
J. Hong, S. A. K. Häkkinen, M. Paramonov, M. Äijälä, J. Hakala, T. Nieminen, J. Mikkilä, N. L. Prisle, M. Kulmala  , I. Riipinen, M. Bilde, V.-M. Kerminen, T. Petäjä |
| 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 ; 14, no. 9 ; Nr. 14, no. 9 (2014-05-13), S.4733-4748 |
| Datensatznummer |
250118698
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| Publikation (Nr.) |
 copernicus.org/acp-14-4733-2014.pdf |
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| Zusammenfassung |
| A Volatility-Hygroscopicity Tandem Differential Mobility Analyzer (VH-TDMA)
was applied to study the hygroscopicity and volatility properties of
submicron atmospheric aerosol particles in a boreal forest environment in
Hyytiälä, Finland during the summer of 2010. Aitken and accumulation
mode internally mixed particles (50 nm, 75 nm and 110 nm in diameter) were
investigated. Hygroscopicity was found to increase with particle size. The
relative mass fraction of organics and SO42- is probably the major
contributor to the fluctuation of the hygroscopicity for all particle sizes.
The Cloud Condensation Nuclei Counter (CCNC)-derived hygroscopicity
parameter κ was observed to be slightly higher than
κ calculated from VH-TDMA data under sub-saturated conditions,
potential reasons for this behavior are discussed shortly. Also, the
size-resolved volatility properties of particles were investigated. Upon
heating, more small particles evaporated compared to large particles. There
was a significant amount of aerosol volume (non-volatile material) left, even
at heating temperatures of 280 °C. Using size resolved
volatility-hygroscopicity analysis, we concluded that there was always
hygroscopic material remaining in the particles at different heating
temperatures, even at 280 °C. This indicates that the
observed non-volatile aerosol material did not consist solely of black
carbon. |
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