Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval
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 th...
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ftunivhongkonghu:oai:hub.hku.hk:10722/210089 2023-05-15T14:40:07+02:00 Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval Maccali, Jenny Not, Christelle Poirier, André Hillaire-Marcel, Claude 2013 https://doi.org/10.1016/j.quascirev.2013.05.001 http://hdl.handle.net/10722/210089 eng eng Quaternary Science Reviews Quaternary Science Reviews, 2013, v. 79, p. 184-190 doi:10.1016/j.quascirev.2013.05.001 190 0277-3791 eid_2-s2.0-84885950691 184 http://hdl.handle.net/10722/210089 79 Meltwater Sea-ice Younger Dryas Isotopes Arctic Article 2013 ftunivhongkonghu https://doi.org/10.1016/j.quascirev.2013.05.001 2023-01-14T16:06:40Z 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. Link_to_subscribed_fulltext Article in Journal/Newspaper Arctic Beaufort Sea Fram Strait Ice Sheet Lomonosov Ridge Sea ice Svalbard University of Hong Kong: HKU Scholars Hub Arctic Svalbard Quaternary Science Reviews 79 184 190 |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
Meltwater Sea-ice Younger Dryas Isotopes Arctic |
spellingShingle |
Meltwater Sea-ice Younger Dryas Isotopes Arctic Maccali, Jenny Not, Christelle Poirier, André Hillaire-Marcel, Claude Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
topic_facet |
Meltwater Sea-ice Younger Dryas Isotopes Arctic |
description |
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. Link_to_subscribed_fulltext |
format |
Article in Journal/Newspaper |
author |
Maccali, Jenny Not, Christelle Poirier, André Hillaire-Marcel, Claude |
author_facet |
Maccali, Jenny Not, Christelle Poirier, André Hillaire-Marcel, Claude |
author_sort |
Maccali, Jenny |
title |
Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
title_short |
Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
title_full |
Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
title_fullStr |
Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
title_full_unstemmed |
Geochemical and isotopic tracers of Arctic sea ice sources and export with special attention to the Younger Dryas interval |
title_sort |
geochemical and isotopic tracers of arctic sea ice sources and export with special attention to the younger dryas interval |
publishDate |
2013 |
url |
https://doi.org/10.1016/j.quascirev.2013.05.001 http://hdl.handle.net/10722/210089 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Beaufort Sea Fram Strait Ice Sheet Lomonosov Ridge Sea ice Svalbard |
genre_facet |
Arctic Beaufort Sea Fram Strait Ice Sheet Lomonosov Ridge Sea ice Svalbard |
op_relation |
Quaternary Science Reviews Quaternary Science Reviews, 2013, v. 79, p. 184-190 doi:10.1016/j.quascirev.2013.05.001 190 0277-3791 eid_2-s2.0-84885950691 184 http://hdl.handle.net/10722/210089 79 |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.05.001 |
container_title |
Quaternary Science Reviews |
container_volume |
79 |
container_start_page |
184 |
op_container_end_page |
190 |
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1766312035096723456 |