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The vertical distribution of atmospheric DMS in the high Arctic summer
Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden..
Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden..
Univ Innsbruck, Inst Ionenphys & Angew Phys, A-6020 Innsbruck, Austria..
Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden..
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2010 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 62, no 3, p. 160-171Article in journal (Refereed) Published
Abstract [en]

The vertical structure of gas-phase dimethyl sulphide [DMS(g)] in the high Arctic atmosphere is investigated during a summer season. The model results show that the near-surface DMS(g) concentration over open ocean is very variable both in time and space, depending on the local atmospheric conditions. Profiles over ocean have typically highest concentration near the surface and decrease exponentially with height. Over the pack-ice, the concentrations are typically lower and the vertical structure changes as the air is advected northward. Modelled DMS(g) maxima above the local boundary layer were present in about 3% of the profiles found over the pack-ice. These maxima were found in association to frontal zones. Our results also show that DMS(g) can be mixed downward by turbulence into the local boundary layer and act as a local near-surface DIMS(g) source over the pack-ice and may hence influence the growth of cloud condensation nuclei and cloud formation in the boundary layer. Profile observations are presented in support to the model results. They show that significant DMS(g) concentrations exist in the Arctic atmosphere at altitudes not to be expected when only considering vertical mixing in the boundary layer.

Place, publisher, year, edition, pages
2010. Vol. 62, no 3, p. 160-171
National Category
Natural Sciences
Research subject
SWEDARCTIC 2001, Arctic Ocean 2001
Identifiers
URN: urn:nbn:se:polar:diva-2347DOI: 10.1111/j.1600-0889.2010.00458.xISI: 000279557000003OAI: oai:DiVA.org:polar-2347DiVA, id: diva2:858561
Available from: 2015-10-02 Created: 2015-10-02 Last updated: 2017-12-01

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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
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  • asciidoc
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