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Air-sea gas transfer in high Arctic fjords
Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Sustainable Building Engineering. Uppsala University, Uppsala.
Univ Ctr Svalbard, Dept Arctic Geophys, Longyearbyen, Norway.
Uppsala Univ, Dept Earth Sci, Uppsala; Univ Ctr Svalbard, Longyearbyen, Norway.
Swansea Univ, Swansea, Wales.
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2017 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 44, no 5, 2519-2526 p.Article in journal (Refereed) Published
Abstract [en]

In Arctic fjords and high-latitude seas, strong surface cooling dominates during a large part of the year, generating water-side convection (w(*w)) and enhanced turbulence in the water. These regions are key areas for the global carbon cycle; thus, a correct description of their air-sea gas exchange is crucial. CO2 data were measured via the eddy covariance technique in marine Arctic conditions and reveal that water-side convection has a major impact on the gas transfer velocity. This is observed even at wind speeds as high as 9ms(-1), where convective motions are generally thought to be suppressed by wind-driven turbulence. The enhanced air-sea transfer of CO2 caused by water-side convection nearly doubled the CO2 uptake; after scaled to open-sea conditions the contribution from w(*w) to the CO2 flux remained as high as 34%. This phenomenon is expected to be highly important for the total carbon uptake in marine Arctic areas.

Place, publisher, year, edition, pages
2017. Vol. 44, no 5, 2519-2526 p.
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:miun:diva-30631DOI: 10.1002/2016GL072373ISI: 000398183700053OAI: oai:DiVA.org:miun-30631DiVA: diva2:1089845
Available from: 2017-04-21 Created: 2017-04-21 Last updated: 2017-04-21Bibliographically approved

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