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dc.contributor.authorTelesiński, Maciej M.
dc.contributor.authorEzat, Mohamed
dc.contributor.authorMuschitiello, Francesco
dc.contributor.authorBauch, Henning A.
dc.contributor.authorSpielhagen, Robert F.
dc.date.accessioned2021-08-04T10:41:34Z
dc.date.available2021-08-04T10:41:34Z
dc.date.issued2021-03-24
dc.description.abstractChanges in ocean circulation are considered a major driver of centennial-to-millennial scale climate variability during the last deglaciation. Using four sediment records from the Nordic Seas, we studied radiocarbon ventilation ages in subsurface and bottom waters to reconstruct past variations in watermass overturning. Planktic foraminiferal ages show significant spatial variability over most of the studied period. These differences suggest that the ventilation of the shallower subsurface waters is strongly influenced by local conditions such as sea-ice and meltwater input, changes in mixed-layer depth, and/or variable contributions of water masses with different <sup>14</sup>C signatures. Despite covering a significant water depth range, the benthic foraminiferal records show common long-term patterns, with generally weaker ventilation during stadials and stronger during interstadials. The Greenland Sea record differs the most from the other records, which can be explained by the greater depth and the geographical distance of this site. The benthic records reflect regional shifts in deep convection and suggest that the deep Nordic Seas have been generally bathed by a single, though changing, deep-water mass analogous to the present-day Greenland Sea Deep Water. Since significant offsets in ventilation ages are yielded by different taxonomic or ecological groups of benthic foraminifera, the use of uniform material seems a prerequisite to reconstruct bottom water ventilation histories.en_US
dc.identifier.citationTelesiński, Ezat M, Muschitiello F, Bauch HA, Spielhagen RF. Ventilation History of the Nordic Seas Deduced from Pelagic‐Benthic Radiocarbon Age Offsets. Geochemistry Geophysics Geosystems. 2021en_US
dc.identifier.cristinIDFRIDAID 1900659
dc.identifier.doi10.1029/2020GC009132
dc.identifier.issn1525-2027
dc.identifier.urihttps://hdl.handle.net/10037/21921
dc.language.isoengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.journalGeochemistry Geophysics Geosystems
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRINATEK/274429/Norway/Paleo-perspectives for the future circulation and carbon cycle dynamics in the Arctic Ocean//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 American Geophysical Unionen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466en_US
dc.titleVentilation History of the Nordic Seas Deduced from Pelagic‐Benthic Radiocarbon Age Offsetsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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