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| Titel |
Particle concentration and flux dynamics in the atmospheric boundary layer as the indicator of formation mechanism |
| VerfasserIn |
J. Lauros, A. Sogachev, S. Smolander, H. Vuollekoski, S.-L. Sihto, I. Mammarella, L. Laakso, Ü. Rannik, M. Boy |
| 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 ; 11, no. 12 ; Nr. 11, no. 12 (2011-06-16), S.5591-5601 |
| Datensatznummer |
250009847
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| Publikation (Nr.) |
 copernicus.org/acp-11-5591-2011.pdf |
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| Zusammenfassung |
We carried out column model simulations to study particle fluxes and
deposition and to evaluate different particle formation mechanisms at
a boreal forest site in Finland. We show that kinetic nucleation of
sulphuric acid cannot be responsible for new particle formation alone
as the simulated vertical profile of particle number concentration
does not correspond to observations. Instead organic induced
nucleation leads to good agreement confirming the relevance of the
aerosol formation mechanism including organic compounds emitted by the
biosphere.
The simulation of aerosol concentration within the atmospheric
boundary layer during nucleation event days shows a highly dynamical
picture, where particle formation is coupled with chemistry and
turbulent transport. We have demonstrated the suitability of our
turbulent mixing scheme in reproducing the most important
characteristics of particle dynamics within the boundary
layer. Deposition and particle flux simulations show that deposition
affects noticeably only the smallest particles in the lowest part of
the atmospheric boundary layer. |
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