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dc.contributor.authorEzat, Mohamed
dc.contributor.authorRasmussen, Tine Lander
dc.contributor.authorHain, Mathis P.
dc.contributor.authorGreaves, Mervyn
dc.contributor.authorRae, James W.B.
dc.contributor.authorZamelczyk, Katarzyna
dc.contributor.authorMarchitto, Thomas M.
dc.contributor.authorSzidat, Sönke
dc.contributor.authorSkinner, Luke C.
dc.date.accessioned2021-08-12T10:41:25Z
dc.date.available2021-08-12T10:41:25Z
dc.date.issued2021-07-19
dc.description.abstractThe Fram Strait is the only deep gateway between the Arctic Ocean and the Nordic Seas and thus is a key area to study past changes in ocean circulation and the marine carbon cycle. Here, we study deep ocean temperature, δ18O, carbonate chemistry (i.e., carbonate ion concentration [CO32−]), and nutrient content in the Fram Strait during the late glacial (35,000–19,000 years BP) and the Holocene based on benthic foraminiferal geochemistry and carbon cycle modeling. Our results indicate a thickening of Atlantic water penetrating into the northern Nordic Seas, forming a subsurface Atlantic intermediate water layer reaching to at least ∼2,600 m water depth during most of the late glacial period. The recirculating Atlantic layer was characterized by relatively high [CO32−] and low δ13C during the late glacial, and provides evidence for a Nordic Seas source to the glacial North Atlantic intermediate water flowing at 2,000–3,000 m water depth, most likely via the Denmark Strait. In addition, we discuss evidence for enhanced terrestrial carbon input to the Nordic Seas at ∼23.5 ka. Comparing our δ13C and qualitative [CO32−] records with results of carbon cycle box modeling suggests that the total terrestrial CO2 release during this carbon input event was low, slow, or directly to the atmosphere.en_US
dc.identifier.citationEzat M, Rasmussen TLR, Hain, Greaves, Rae, Zamelczyk K, Marchitto TM, Szidat S, Skinner LC. Deep ocean storage of heat and CO2 in the Fram Strait, Arctic Ocean during the last glacial period. Paleoceanography and Paleoclimatology. 2021;36(8)en_US
dc.identifier.cristinIDFRIDAID 1923003
dc.identifier.doi10.1029/2021PA004216
dc.identifier.issn2572-4517
dc.identifier.issn2572-4525
dc.identifier.urihttps://hdl.handle.net/10037/22013
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalPaleoceanography and Paleoclimatology
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.relation.projectIDEC/FP7: 274429en_US
dc.relation.projectIDTromsø forskningsstiftelse: ARCLIMen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/?/274429?/?/?/?/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleDeep ocean storage of heat and CO2 in the Fram Strait, Arctic Ocean during the last glacial perioden_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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