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| Titel |
Variations in tropospheric submicron particle size distributions across the European continent 2008–2009 |
| VerfasserIn |
D. C. S. Beddows, M. Dall'Osto, R. M. Harrison, M. Kulmala  , A. Asmi, A. Wiedensohler, P. Laj, A. M. Fjǽraa, K. Sellegri, W. Birmili, N. Bukowiecki, E. Weingärtner, U. Baltensperger, V. Ždímal, N. Zikova, J.-P. Putaud, A. Marinoni, P. Tunved, H.-C. Hansson, M. Fiebig, N. Kivekäs, E. Swietlicki, H. Lihavainen, E. Asmi, V. Ulevicius, P. P. Aalto, N. Mihalopoulos, N. Kalivitis, I. Kalapov, G. Kiss, G. de Leeuw, B. Henzing, C. O'Dowd, S. G. Jennings, H. Flentje, F. Meinhardt, L. Ries, H. A. C. Denier van der Gon, A. J. H. Visschedijk |
| 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. 8 ; Nr. 14, no. 8 (2014-04-30), S.4327-4348 |
| Datensatznummer |
250118649
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| Publikation (Nr.) |
 copernicus.org/acp-14-4327-2014.pdf |
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| Zusammenfassung |
Cluster~analysis of particle number size distributions from~background sites
across Europe~is presented. This generated a total of nine clusters of
particle size distributions which could be further combined into two main
groups, namely: a south-to-north category (four clusters) and a west-to-east
category (five clusters). The first group was identified as most frequently
being detected inside and around northern Germany and neighbouring
countries, showing clear evidence of local afternoon nucleation and growth
events that could be linked to movement of air masses from south to north
arriving ultimately at the Arctic contributing to Arctic haze.~The second
group of particle size spectra proved to have narrower size distributions
and collectively showed a dependence of modal diameter upon the longitude of
the site (west to east) at which they were most frequently detected.~These
clusters indicated regional nucleation (at the coastal sites) growing to
larger modes further inland. The apparent growth rate of the modal diameter
was around 0.6–0.9 nm h−1.
Four specific air mass back-trajectories were successively taken as case
studies to examine in real time the evolution of aerosol size distributions
across Europe. ~While aerosol growth processes can be observed as aerosol
traverses Europe, the processes are often obscured by the addition of
aerosol by emissions en route. This study revealed that some of the 24
stations exhibit more complex behaviour than others, especially when
impacted by local sources or a variety of different air masses. Overall, the
aerosol size distribution clustering analysis greatly simplifies the complex
data set and allows a description of aerosol aging processes, which reflects
the longer-term average development of particle number size distributions as
air masses advect across Europe. |
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