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- Publisher Website: 10.1016/j.quascirev.2013.05.001
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Article: Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval
Title | Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
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Authors | |
Keywords | Arctic Isotopes Younger Dryas Meltwater Sea-ice |
Issue Date | 2013 |
Citation | Quaternary Science Reviews, 2013, v. 79, p. 184-190 How to Cite? |
Abstract | Radiogenic isotopes (Sr, Nd) in Ice Rafted Debris (IRD) sediments from the Lomonosov Ridge and Fram Strait Arctic areas are used to document changes in Arctic sea-ice sources and trajectories since the Last Glacial Maximum (LGM). The two records provide evidence for enhanced sea-ice production in the Beaufort Sea and its subsequent export through Fram Strait during the Younger Dryas (YD) interval. This pattern, exclusive to the YD, followed an LGM-Bølling-Allerød interval, when multiyear and/or reduced sea-ice mobility resulted in sedimentary hiatuses in the Central Arctic. Meanwhile, IRD from Svalbard-Barents ice-sheet margin source were still deposited in the Fram Strait area. The "isotopic excursion" of the YD points to enhanced sea-ice production in the Beaufort Sea, which we link to the Lake Agassiz (?)/Laurentide ice sheet drainage event through the Mackenzie route. Following this event, the Holocene depicts a 5-fold reduction in IRD rates with a shift towards prominent sea-ice production along Russian shelves. From a methodological viewpoint, we demonstrate that radiogenic isotopes must be used in a multi-proxy approach to better constrain IRD and sea-ice sources and routes. From a paleoceanographic perspective, we conclude that an Arctic freshwater/sea-ice export route should now be seen as the most likely mechanism for an AMOC reduction during the YD in accordance with more recent improved model experiment. © 2013 Elsevier Ltd. |
Persistent Identifier | http://hdl.handle.net/10722/210089 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 1.558 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Hillaire-Marcel, Claude | - |
dc.contributor.author | Maccali, Jenny | - |
dc.contributor.author | Not, Christelle | - |
dc.contributor.author | Poirier, André | - |
dc.date.accessioned | 2015-05-22T06:06:34Z | - |
dc.date.available | 2015-05-22T06:06:34Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Quaternary Science Reviews, 2013, v. 79, p. 184-190 | - |
dc.identifier.issn | 0277-3791 | - |
dc.identifier.uri | http://hdl.handle.net/10722/210089 | - |
dc.description.abstract | Radiogenic isotopes (Sr, Nd) in Ice Rafted Debris (IRD) sediments from the Lomonosov Ridge and Fram Strait Arctic areas are used to document changes in Arctic sea-ice sources and trajectories since the Last Glacial Maximum (LGM). The two records provide evidence for enhanced sea-ice production in the Beaufort Sea and its subsequent export through Fram Strait during the Younger Dryas (YD) interval. This pattern, exclusive to the YD, followed an LGM-Bølling-Allerød interval, when multiyear and/or reduced sea-ice mobility resulted in sedimentary hiatuses in the Central Arctic. Meanwhile, IRD from Svalbard-Barents ice-sheet margin source were still deposited in the Fram Strait area. The "isotopic excursion" of the YD points to enhanced sea-ice production in the Beaufort Sea, which we link to the Lake Agassiz (?)/Laurentide ice sheet drainage event through the Mackenzie route. Following this event, the Holocene depicts a 5-fold reduction in IRD rates with a shift towards prominent sea-ice production along Russian shelves. From a methodological viewpoint, we demonstrate that radiogenic isotopes must be used in a multi-proxy approach to better constrain IRD and sea-ice sources and routes. From a paleoceanographic perspective, we conclude that an Arctic freshwater/sea-ice export route should now be seen as the most likely mechanism for an AMOC reduction during the YD in accordance with more recent improved model experiment. © 2013 Elsevier Ltd. | - |
dc.language | eng | - |
dc.relation.ispartof | Quaternary Science Reviews | - |
dc.subject | Arctic | - |
dc.subject | Isotopes | - |
dc.subject | Younger Dryas | - |
dc.subject | Meltwater | - |
dc.subject | Sea-ice | - |
dc.title | Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.quascirev.2013.05.001 | - |
dc.identifier.scopus | eid_2-s2.0-84885950691 | - |
dc.identifier.volume | 79 | - |
dc.identifier.spage | 184 | - |
dc.identifier.epage | 190 | - |
dc.identifier.isi | WOS:000327909900016 | - |
dc.identifier.issnl | 0277-3791 | - |