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dc.contributor.authorMiettinen, A.
dc.contributor.authorDivine, D.V.
dc.contributor.authorKoc, N.
dc.contributor.authorGodtliebsen, F.
dc.contributor.authorHall, I.R.
dc.date.accessioned2012-10-23T11:29:07Z
dc.date.available2012-10-23T11:29:07Z
dc.date.issued2012
dc.description.abstractA 2800-yr-long August sea surface temperature (aSST) record based on fossil diatom assemblages is generated from a marine sediment core from the northern subpolar North Atlantic. The record is compared with the aSST record from the Norwegian Sea to explore the variability of the aSST gradient between these areas during the late Holocene. The aSST records demonstrate the opposite climate tendencies toward a persistent warming in the core site in the subpolar North Atlantic and cooling in the Norwegian Sea. At the multicentennial scale of aSST variability of 600–900 yr, the records are nearly in antiphase with warmer (colder) periods in the subpolar North Atlantic corresponding to the colder (warmer) periods in the Norwegian Sea. At the shorter time scale of 200–450 yr, the records display a phase-locked behavior with a tendency for the positive aSST anomalies in the Norwegian Sea to lead, by ~30 yr, the negative aSST anomalies in the subpolar North Atlantic. This apparent aSST seesaw might have an effect on two major anomalies of the European climate of the past Millennium: Medieval Warm Period (MWP) and the Little Ice Age (LIA). During the MWP warming of the sea surface in the Norwegian Sea occurred in parallel with cooling in the northern subpolar North Atlantic, whereas the opposite pattern emerged during the LIA. The results suggest that the observed aSST seesaw between the subpolar North Atlantic and the Norwegian Sea could be a surface expression of the variability of the eastern and western branches of the Atlantic meridional overturning circulation (AMOC) with a possible amplification through atmospheric feedback.en
dc.identifier.citationJournal of Climate 25(2012) nr. 12 s. 4205-4219en
dc.identifier.cristinIDFRIDAID 950743
dc.identifier.doidoi: 10.1175/JCLI-D-11-00581.1
dc.identifier.issn0894-8755
dc.identifier.urihttps://hdl.handle.net/10037/4572
dc.identifier.urnURN:NBN:no-uit_munin_4306
dc.language.isoengen
dc.publisherAmerican Meteorological Societyen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Other geosciences: 469en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Andre geofag: 469en
dc.titleMulticentennial Variability of the Sea Surface Temperature Gradient across the Subpolar North Atlantic over the Last 2.8 kyren
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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