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| Titel |
The first estimates of global nucleation mode aerosol concentrations based on satellite measurements |
| VerfasserIn |
M. Kulmala  , A. Arola, T. Nieminen, L. Riuttanen, L. Sogacheva, G. Leeuw, V.-M. Kerminen, K. E. J. Lehtinen |
| 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. 21 ; Nr. 11, no. 21 (2011-11-02), S.10791-10801 |
| Datensatznummer |
250010159
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| Publikation (Nr.) |
 copernicus.org/acp-11-10791-2011.pdf |
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| Zusammenfassung |
| Atmospheric aerosols play a key role in the Earth's climate system by
scattering and absorbing solar radiation and by acting as cloud condensation
nuclei. Satellites are increasingly used to obtain information on properties
of aerosol particles with a diameter larger than about 100 nm. However, new
aerosol particles formed by nucleation are initially much smaller and grow
into the optically active size range on time scales of many hours. In this
paper we derive proxies, based on process understanding and ground-based
observations, to determine the concentrations of these new particles and
their spatial distribution using satellite data. The results are applied to
provide seasonal variation of nucleation mode concentration. The proxies
describe the concentration of nucleation mode particles over continents. The
source rates are related to both regional nucleation and nucleation
associated with more restricted sources. The global pattern of nucleation
mode particle number concentration predicted by satellite data using our
proxies is compared qualitatively against both observations and global model
simulations. |
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