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Publication:
Deep Ocean Storage of Heat and CO2 in the Fram Strait, Arctic Ocean During the Last Glacial Period

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dc.contributor.authorEzat, Mohamed M.
dc.contributor.authorRasmussen, Tine L.
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.accessioned2024-09-02T17:41:48Z
dc.date.available2024-09-02T17:41:48Z
dc.date.issued2021
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 [CO3 2−]), 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 [CO3 2−] 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 [CO3 2−] 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.
dc.description.numberOfPages13
dc.description.sponsorshipDepartement für Chemie, Biochemie und Pharmazie (DCBP)
dc.identifier.doi10.48350/157943
dc.identifier.publisherDOI10.1029/2021PA004216
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/42886
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.relation.ispartofPaleoceanography and paleoclimatology
dc.relation.issn0883-8305
dc.relation.organizationDCD5A442C08FE17DE0405C82790C4DE2
dc.relation.organizationDCD5A442C14DE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::540 - Chemistry
dc.titleDeep Ocean Storage of Heat and CO2 in the Fram Strait, Arctic Ocean During the Last Glacial Period
dc.typearticle
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.volume36
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oairecerif.author.affiliationDepartement für Chemie, Biochemie und Pharmazie (DCBP)
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unibe.date.licenseChanged2021-08-10 06:56:00
unibe.description.ispublishedpub
unibe.eprints.legacyId157943
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unibe.subtype.articlejournal

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