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dc.contributor.authorRahaman, Waliur
dc.contributor.authorSmik, Lukas
dc.contributor.authorKöseoğlu, Denizcan
dc.contributor.authorLathika, N.
dc.contributor.authorTarique, Mohd
dc.contributor.authorThamban, Meloth
dc.contributor.authorHaywood, Alan
dc.contributor.authorBelt, Simon T.
dc.contributor.authorKnies, Jochen
dc.date.accessioned2020-09-05T13:26:13Z
dc.date.available2020-09-05T13:26:13Z
dc.date.issued2020-09-01
dc.description.abstractQuantifying the contribution of poleward oceanic heat transport to the Arctic Ocean is important for making future sea ice and climate predictions. To highlight its potential importance in a warmer world, we present a new record of water-mass exchange between the Atlantic and the Arctic Oceans using the authigenic neodymium isotopic composition of marine sediments from the Fram Strait during the past ∼3.4 to 2.6 Ma. In this study, we target the mid-Pliocene Warm Period (mPWP: 3.264–3.025 Ma) of the Pliocene epoch, the most recent geological analogue for future climate change. We complement our semi-quantitative water mass exchange reconstruction with estimates of spring sea ice concentration based on source-specific biomarkers. Our estimates of volume transport of warm waters into the Arctic Ocean suggest long-term secular changes from the lowest during the Marine Isotope Stage M2 “glacial” (3.312–3.264 Ma), to near complete “Atlantification” of the Eurasian sector of the Arctic Ocean during the mPWP. Orbital forcing is found to be the dominant controlling factor for modulating northward volume transport of Atlantic-derived water masses, with an associated reduction in Arctic spring sea ice concentration of ∼30–35%. Current generation models often produce diverging results, however, and have not yet been validated against proxy data in northern high latitude settings during the mPWP. Our new results of northward volume transport and sea ice extent therefore provide much needed input for validation of current generation models aimed at improving the robustness of future climate modeling in the Arctic.en_US
dc.identifier.citationRahaman, Smik L, Köseoğlu D, Lathika, Tarique, Thamban M, Haywood AM, Belt ST, Knies J. Reduced Arctic sea ice extent during the mid-Pliocene Warm Period concurrent with increased Atlantic-climate regime. Earth and Planetary Science Letters. 2020;550en_US
dc.identifier.cristinIDFRIDAID 1826661
dc.identifier.doi10.1016/j.epsl.2020.116535
dc.identifier.issn0012-821X
dc.identifier.issn1385-013X
dc.identifier.urihttps://hdl.handle.net/10037/19225
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalEarth and Planetary Science Letters
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/POLARPROG/248793/Norway/Pliocene Arctic Climate Teleconnections//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 Elsevier B.V.en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Sedimentology: 456en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452en_US
dc.titleReduced Arctic sea ice extent during the mid-Pliocene Warm Period concurrent with increased Atlantic-climate regimeen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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