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| Titel |
Antarctic new particle formation from continental biogenic precursors |
| VerfasserIn |
E.-M. Kyrö, V.-M. Kerminen, A. Virkkula, M. Maso, J. Parshintsev, J. Ruíz-Jimenez, L. Forsström, H. E. Manninen, M.-L. Riekkola, P. Heinonen, M. Kulmala  |
| 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. 7 ; Nr. 13, no. 7 (2013-04-02), S.3527-3546 |
| Datensatznummer |
250018563
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| Publikation (Nr.) |
 copernicus.org/acp-13-3527-2013.pdf |
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| Zusammenfassung |
| Over Antarctica, aerosol particles originate almost entirely from marine
areas, with minor contribution from long-range transported dust or
anthropogenic material. The Antarctic continent itself, unlike all other
continental areas, has been thought to be practically free of aerosol
sources. Here we present evidence of local aerosol production associated
with melt-water ponds in continental Antarctica. We show that in air
masses passing such ponds, new aerosol particles are efficiently formed and
these particles grow up to sizes where they may act as cloud condensation
nuclei (CCN). The precursor vapours responsible for aerosol formation and
growth originate very likely from highly abundant cyanobacteria Nostoc commune (Vaucher)
communities of local ponds. This is the first time freshwater
vegetation has been identified as an aerosol precursor source. The influence
of the new source on clouds and climate may increase in future Antarctica,
and possibly elsewhere undergoing accelerating summer melting of
semi-permanent snow cover. |
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