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dc.contributor.authorConsolaro, Chiara
dc.contributor.authorRasmussen, Tine Lander
dc.contributor.authorPanieri, Giuliana
dc.date.accessioned2018-07-23T10:42:11Z
dc.date.available2018-07-23T10:42:11Z
dc.date.issued2017-11-14
dc.description.abstractBenthic and planktonic foraminifera, stable isotopes and other geochemical and sedimentological parameters have been investigated in a sediment core from Vestnesa Ridge (79°N, NW Svalbard margin, 1300 m water depth) in order to reconstruct the palaeoceanographic and palaeoenvironmental evolution of the eastern Fram Strait during the last 14,000 years. Our multiproxy data and, in particular, our high-resolution benthic foraminiferal record allow a detailed reconstruction of the intermediate water flow in the eastern Fram Strait. During the Bølling-Allerød warm interstadials the high proportion of the benthic Atlantic species <i>Cassidulina neoteretis</i> suggests the presence of chilled Atlantic-derived water at the bottom of the Vestnesa Ridge, while the dominance of the polar planktonic species <i>Neogloboquadrina pachyderma</i> (s) indicates cold polar surface conditions. During the Younger Dryas cold stadial the inflow of Atlantic-derived water was weakened and of lower temperature compared to the previous interval, as suggested by the increase in the glacio-marine indicator <i>Cassidulina reniforme</i> and the lower percentages of <i>C. neoteretis</i>. After 11,000 cal yr BP the abrupt increase in relative abundance of the benthic species <i>Cibicides wuellerstorfi</i> and <i>Oridorsalis umbonatus</i>, indicates a shift to interglacial conditions with deep convection and generation of cold intermediate water. Warm surface water conditions were finally established at about 10,300 cal yr BP, when <i>Turborotalita quinqueloba</i> became the dominant planktonic species. Generally warmer conditions than today were recorded in the middle Holocene, with a mild cooling at about 8200 cal yr BP and a more pronounced cool interval with an abrupt decrease in <i>T. quinqueloba</i> between 7000 and 6200 cal yr BP. Cold climatic conditions were established around 4100 cal yr BP when <i>N. pachyderma</i> (s) became again the dominant species and the polar benthic species <i>Cribroelphidium excavatum</i> appeared.en_US
dc.description.sponsorshipThe Mohn Foundation UiT The Arctic University of Norwayen_US
dc.descriptionSubmitted manuscript version. Published version available at <a href=https://doi.org/10.1016/j.marmicro.2017.11.001> https://doi.org/10.1016/j.marmicro.2017.11.001</a>. Submitted manuscript version, licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0.</a>en_US
dc.identifier.citationConsolaro, C., Rasmussen, T.L.R. & Panieri, G. (2017). Palaeoceanographic and environmental changes in the eastern Fram Strait during the last 14,000 years based on benthic and planktonic foraminifera. Marine Micropaleontology, 139, 84-101. https://doi.org/10.1016/j.marmicro.2017.11.001en_US
dc.identifier.cristinIDFRIDAID 1519068
dc.identifier.doi10.1016/j.marmicro.2017.11.001
dc.identifier.issn0377-8398
dc.identifier.issn1872-6186
dc.identifier.urihttps://hdl.handle.net/10037/13245
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalMarine Micropaleontology
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/EC/FP7-ENVIRONMENT/226354/EU/Hotspot Ecosystem Research and Man's Impact on European seas//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titlePalaeoceanographic and environmental changes in the eastern Fram Strait during the last 14,000 years based on benthic and planktonic foraminiferaen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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