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How does the SST variability over the western North Atlantic Ocean control Arctic warming over the Barents-Kara Seas?

Title
How does the SST variability over the western North Atlantic Ocean control Arctic warming over the Barents-Kara Seas?
Authors
Jung O.Sung M.-K.Sato K.Lim Y.-K.Kim S.-J.Baek E.-H.Jeong J.-H.Kim B.-M.
Ewha Authors
성미경
Issue Date
2017
Journal Title
Environmental Research Letters
ISSN
1748-9318JCR Link
Citation
Environmental Research Letters vol. 12, no. 3
Keywords
Arctic warming; Stationary Wave Model; Transient eddy vorticity forcing; Western North Atlantic Ocean
Publisher
Institute of Physics Publishing
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Arctic warming over the Barents-Kara Seas and its impacts on the mid-latitude circulations have been widely discussed. However, the specific mechanism that brings the warming still remains unclear. In this study, a possible cause of the regional Arctic warming over the Barents-Kara Seas during early winter (October-December) is suggested. We found that warmer sea surface temperature anomalies over the western North Atlantic Ocean (WNAO) modulate the transient eddies overlying the oceanic frontal region. The altered transient eddy vorticity flux acts as a source for the Rossby wave straddling the western North Atlantic and the Barents-Kara Seas (Scandinavian pattern), and induces a significant warm advection, increasing surface and lowerlevel temperature over the Eurasian sector of the Arctic Ocean. The importance of the sea surface temperature anomalies over the WNAO and subsequent transient eddy forcing over the WNAO was also supported by both specially designed simple model experiments and general circulation model experiments. © 2017 IOP Publishing Ltd.
DOI
10.1088/1748-9326/aa5f3b
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