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| Titel |
Airborne measurements of nucleation mode particles II: boreal forest nucleation events |
| VerfasserIn |
C. D. O'Dowd, Y. J. Yoon, W. Junkermann, P. Aalto, M. Kulmala  , H. Lihavainen, Y. Viisanen |
| 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 ; 9, no. 3 ; Nr. 9, no. 3 (2009-02-06), S.937-944 |
| Datensatznummer |
250006821
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| Publikation (Nr.) |
 copernicus.org/acp-9-937-2009.pdf |
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| Zusammenfassung |
| Airborne measurements of nucleation mode aerosol
concentrations during nucleation events over the boreal forest of southern
Finland are reported. Three case studies are analyzed in an attempt to
characterise the spatial scales over which these events occur and to
identify the source region for particle production. For the cases presented,
there is no evidence of nucleation mode particles in the Free Troposphere.
Nucleation mode particles are first detected in the surface layer as the
nocturnal inversion breaks up and develops into the current-day's new
boundary layer. In terms of spatial variability, significant variability in
the concentration of nucleation mode particles was observed and was
attributed to changes in the topography which comprised a mix of forest
canopy and frozen lakes. Measurements over the Gulf of Bothnia indicated no
nucleation mode over the sea and confirm that the scale of the events is
associated with the boreal forest scale and that the new particles are
produced directly above the forest canopy. |
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