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dc.contributor.authorTegzes, Andrea Dianaeng
dc.contributor.authorJansen, Eysteineng
dc.contributor.authorTelford, Richardeng
dc.date.accessioned2015-09-16T08:55:16Z
dc.date.available2015-09-16T08:55:16Z
dc.date.issued2014-10-24
dc.identifier.issn1814-9332en_US
dc.identifier.issn1814-9324en_US
dc.identifier.urihttps://hdl.handle.net/1956/10458
dc.description.abstractThe so-called "8.2 ka event" is widely regarded as a major Holocene climate perturbation. It is most readily identifiable in the oxygen-isotope records from Greenland ice cores as an approximately 160-year-long cold interval between 8250 and 8090 years BP. The prevailing view has been that the cooling over Greenland, and potentially over the northern North Atlantic at least, was triggered by the catastrophic final drainage of the Agassiz–Ojibway proglacial lake as part of the remnant Laurentide Ice Sheet collapsed over Hudson Bay at around 8420 ± 80 years BP. The consequent freshening of surface waters in the northern North Atlantic Ocean and the Nordic Seas resulted in weaker overturning, and hence reduced northward ocean heat transport. We have reconstructed variations in the strength of the eastern branch of the Atlantic Inflow into the Nordic Seas around the time of the lake outbursts. While the initial freshwater forcing may have been even larger than originally thought, as the lake outbursts may have been accompanied by a major iceberg discharge from Hudson Bay, our proxy records from the mid-Norwegian Margin do not evidence a uniquely large slowdown in the eastern branch of the Atlantic Inflow at the time. Therefore, its main role in the 8.2 ka event may have been the (rapid) advection of fresh and cold waters to high northern latitudes, initiating rapid sea-ice expansion and an increase in surface albedo.en_US
dc.language.isoengeng
dc.publisherCopernicus Publicationsen_US
dc.rightsAttribution CC BYeng
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/eng
dc.titleThe role of the northward-directed (sub)surface limb of the Atlantic Meridional Overturning Circulation during the 8.2 ka eventen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2015-07-30T11:23:54Z
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2014 The Authorsen_US
dc.identifier.doihttps://doi.org/10.5194/cp-10-1887-2014
dc.identifier.cristin1194522
dc.source.journalClimate of the Past
dc.source.4010
dc.source.145
dc.source.pagenumber1887-1904
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452


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