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| Titel |
Analysis of particle size distribution changes between three measurement sites in northern Scandinavia |
| VerfasserIn |
R. Väänänen, E.-M. Kyrö, T. Nieminen, N. Kivekäs, H. Junninen, A. Virkkula, M. Dal Maso, H. Lihavainen, Y. Viisanen, B. Svenningsson, T. Holst, A. Arneth, P. P. Aalto, M. Kulmala  , V.-M. Kerminen |
| 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 ; 13, no. 23 ; Nr. 13, no. 23 (2013-12-09), S.11887-11903 |
| Datensatznummer |
250085862
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| Publikation (Nr.) |
 copernicus.org/acp-13-11887-2013.pdf |
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| Zusammenfassung |
| We investigated atmospheric aerosol particle dynamics in a boreal forest
zone in northern Scandinavia. We used aerosol number size distribution data
measured with either a differential mobility particle sizer (DMPS) or
scanning mobility particle sizer (SMPS) at three stations (Värriö,
Pallas and Abisko), and combined these data with the HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory) air mass
trajectory analysis. We compared three approaches: analysis of new particle
formation events, investigation of aerosol particle number size
distributions during the air mass transport from the ocean to individual
stations with different overland transport times, and analysis of changes
in aerosol particle number size distributions during the air mass transport
from one measurement station to another. Aitken-mode particles were found to
have apparent average growth rates of 0.6–0.7 nm h−1 when the air
masses traveled over land. Particle growth rates during the new particle formation (NPF) events were
3–6 times higher than the apparent particle growth during the summer
period. When comparing aerosol dynamics for
different overland transport times between the different stations, no major differences were found, except
that in Abisko the NPF events were observed to take place
in air masses with shorter overland times than at the other stations. We
speculate that this is related to the meteorological differences along the
paths of air masses caused by the land surface topology. When comparing air masses traveling in an east-to-west direction with those traveling
in a west-to-east direction, clear differences in the aerosol dynamics were
seen. Our results suggest that the condensation growth has an important role
in aerosol dynamics even when NPF is not evident. |
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