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| Titel |
Wintertime Arctic Ocean sea water properties and primary marine aerosol concentrations |
| VerfasserIn |
J. Zábori, R. Krejci, A. M. L. Ekman, E. M. Mårtensson, J. Ström, G. Leeuw, E. D. Nilsson |
| 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 ; 12, no. 21 ; Nr. 12, no. 21 (2012-11-07), S.10405-10421 |
| Datensatznummer |
250011573
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| Publikation (Nr.) |
 copernicus.org/acp-12-10405-2012.pdf |
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| Zusammenfassung |
Sea spray aerosols are an important part of the climate system through their direct and indirect
effects. Due to the diminishing sea ice, the Arctic Ocean is one of the most rapidly changing sea
spray aerosol source areas. However, the influence of these changes on primary particle production
is not known.
In laboratory experiments we examined the influence of Arctic Ocean
water temperature, salinity, and oxygen saturation on primary
particle concentration characteristics. Sea water temperature was
identified as the most important of these parameters. A strong
decrease in sea spray aerosol production with increasing water
temperature was observed for water temperatures between
−1°C and 9°C. Aerosol number
concentrations decreased from at least 1400 cm−3 to
350 cm−3. In general, the aerosol number size
distribution exhibited a robust shape with one mode close to dry diameter
Dp 0.2 μm with approximately 45% of
particles at smaller sizes. Changes in sea water temperature did not
result in pronounced change of the shape of the aerosol size
distribution, only in the magnitude of the concentrations. Our
experiments indicate that changes in aerosol emissions are most
likely linked to changes of the physical properties of sea water at
low temperatures. The observed strong dependence of sea spray
aerosol concentrations on sea water temperature, with a large
fraction of the emitted particles in the typical cloud condensation
nuclei size range, provide strong arguments for a more careful
consideration of this effect in climate models. |
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