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Arctic/Atlantic exchanges via the Subpolar Gyre

Bergen Open Research Archive

Show simple item record Langehaug, Helene Reinertsen Medhaug, Iselin Eldevik, Tor Otterå, Odd Helge 2011-12-13T10:28:01Z 2011-12-13T10:28:01Z 2012
dc.identifier.issn 0894-8755
dc.description.abstract In the present study we investigate the decadal variability in the strength and shape of the Subpolar Gyre (SPG) in a 600-year pre-industrial simulation using the Bergen Climate Model. The atmospheric influence on the SPG strength is reflected in the variability of Labrador Sea Water (LSW), which is largely controlled by the North Atlantic Oscillation, the first mode of the North Atlantic atmospheric variability. A combination of the amount of LSW, the overflow from the Nordic Seas, and the second mode of atmospheric variability, the East Atlantic Pattern, explains 44% of the modeled decadal variability in the SPG strength. A prior increase in these components leads to an intensified SPG in the western subpolar region. Typically, an increase of one standard deviation (std) of the overflow (1 std = 0.2 Sv, 1 Sv = 106 m−3 s−1) corresponds to an intensification of about one half std of the SPG strength (1 std = 2 Sv). A similar response is found for an increase of one std in the amount of LSW, and simultaneously the strength of the North Atlantic Current increases by one half std (1 std = 0.9 Sv). en
dc.language.iso eng en
dc.publisher American Meteorological Society en
dc.relation.ispartof <a href="" target="blank">Circulation and transformation of Atlantic and Arctic water masses in climate models</a> en
dc.rights Copyright 2012 American Meteorological Society en
dc.subject Subpolar gyre en
dc.subject Bergen Climate Model en
dc.title Arctic/Atlantic exchanges via the Subpolar Gyre en
dc.type Journal article en
dc.subject.nsi VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 en
dc.type.version publishedVersion en
bora.peerreviewed Peer reviewed
bora.journalTitle Journal of Climate
bibo.volume 25
bibo.issue 7
bibo.pageStart 2421
bibo.pageEnd 2439
bora.cristinID 895415

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