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dc.contributor.authorMedhaug, Iselineng
dc.contributor.authorLangehaug, Helene Reinertseneng
dc.contributor.authorEldevik, Toreng
dc.contributor.authorFurevik, Toreeng
dc.contributor.authorBentsen, Matseng
dc.PublishedClimate Dynamics 39(1-2): 77-93eng
dc.description.abstractVariability in the Atlantic Meridional Overturning Circulation (AMOC) has been analysed using a 600-year pre-industrial control simulation with the Bergen Climate Model. The typical AMOC variability has amplitudes of 1 Sverdrup (1 Sv = 106 m3 s-1) and time scales of 40–70 years. The model is reproducing the observed dense water formation regions and has very realistic ocean transports and water mass distributions. The dense water produced in the Labrador Sea (1/3) and in the Nordic Seas, including the water entrained into the dense overflows across the Greenland-Scotland Ridge (GSR; 2/3), are the sources of North Atlantic Deep Water (NADW) forming the lower limb of the AMOC’s northern overturning. The variability in the Labrador Sea and the Nordic Seas convection is driven by decadal scale air-sea fluxes in the convective region that can be related to opposite phases of the North Atlantic Oscillation. The Labrador Sea convection is directly linked to the variability in AMOC. Linkages between convection and water mass transformation in the Nordic Seas are more indirect. The Scandinavian Pattern, the third mode of atmospheric variability in the North Atlantic, is a driver of the ocean’s poleward heat transport (PHT), the overall constraint on northern water mass transformation. Increased PHT is both associated with an increased water mass exchange across the GSR, and a stronger AMOC.en_US
dc.publisherSpringer Verlagen_US
dc.rightsAttribution CC BYeng
dc.subjectAtlantic Meridional Overturning Circulationeng
dc.subjectDeep water formationeng
dc.subjectWater mass transformationeng
dc.titleMechanisms for decadal scale variability in a simulated Atlantic Meridional Overturning Circulationen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright the authorsen_US
dc.source.journalClimate Dynamics

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