Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene
The Fram Strait is one of the largest gateways through which meltwater and sea ice are exported to the subarctic North Atlantic, transiting the North-East Greenland shelf via the southward flowing East Greenland Current. Observations indicate a recent freshening of the East Greenland Current that ma...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2022
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Online Access: | https://pure.au.dk/portal/da/publications/marine-conditions-and-development-of-the-sirius-water-polynya-on-the-northeast-greenland-shelf-during-the-younger-dryasholocene(d4f06622-6609-4fee-8c17-ba84b9575bf5).html https://doi.org/10.1016/j.quascirev.2022.107647 https://pure.au.dk/ws/files/334896264/1_s2.0_S0277379122002785_main.pdf http://www.scopus.com/inward/record.url?scp=85135502948&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/d4f06622-6609-4fee-8c17-ba84b9575bf5 2023-10-29T02:35:59+01:00 Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene Jackson, Rebecca Andreasen, Nanna Oksman, Mimmi Andersen, Thorbjørn J. Pearce, Christof Seidenkrantz, Marit Solveig Ribeiro, Sofia 2022-09 application/pdf https://pure.au.dk/portal/da/publications/marine-conditions-and-development-of-the-sirius-water-polynya-on-the-northeast-greenland-shelf-during-the-younger-dryasholocene(d4f06622-6609-4fee-8c17-ba84b9575bf5).html https://doi.org/10.1016/j.quascirev.2022.107647 https://pure.au.dk/ws/files/334896264/1_s2.0_S0277379122002785_main.pdf http://www.scopus.com/inward/record.url?scp=85135502948&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Jackson , R , Andreasen , N , Oksman , M , Andersen , T J , Pearce , C , Seidenkrantz , M S & Ribeiro , S 2022 , ' Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene ' , Quaternary Science Reviews , vol. 291 , 107647 . https://doi.org/10.1016/j.quascirev.2022.107647 Dinocysts Foraminifera Greenland Holocene Micropaleontology North-East Greenland Paleoceanography Polynyas Sirius water polynya Younger dryas article 2022 ftuniaarhuspubl https://doi.org/10.1016/j.quascirev.2022.107647 2023-10-04T22:59:05Z The Fram Strait is one of the largest gateways through which meltwater and sea ice are exported to the subarctic North Atlantic, transiting the North-East Greenland shelf via the southward flowing East Greenland Current. Observations indicate a recent freshening of the East Greenland Current that may have implications for wider oceanic circulation regimes. The North-East Greenland shelf is an opportune region to assess these changes back through time. Paleoceanographic reconstructions from the North-East Greenland shelf are sparse and their temporal coverage is limited to the Holocene, limiting our ability to assess the impact of rapid climatic variations on marine conditions, such as during the Younger Dryas/Holocene transition. Here, we present data from a well-dated marine sediment core retrieved from the North-East Greenland shelf (74°N; east of Young Sound-Tyrolerfjord system) that captures the late Younger Dryas Stadial through to the Mid-Holocene at sub-centennial resolution. We apply a multi-proxy approach to reconstruct changes in productivity, surface and bottom ocean conditions. We show that at 74° N the presence of warm Atlantic waters on the inner North-East Greenland shelf was limited to the late Younger Dryas, as the Greenland Ice Sheet retreated landward and isostatic rebound caused the area to uplift. A unique dimension to this record is its location within one of the few biological hotspots on the East Greenland shelf today; the Sirius Water polynya. Archaeological studies indicate the polynya was forming as early as 4500 years ago, but nothing is known about its evolution from a marine perspective. Cooling of bottom waters, increasing sea-surface productivity and more frequent open water conditions indicate an Early Holocene onset of the Sirius Water (ca. 10–8.7 ka BP). Article in Journal/Newspaper East Greenland east greenland current Fram Strait Greenland Ice Sheet North Atlantic Sea ice Subarctic Aarhus University: Research Quaternary Science Reviews 291 107647 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Dinocysts Foraminifera Greenland Holocene Micropaleontology North-East Greenland Paleoceanography Polynyas Sirius water polynya Younger dryas |
spellingShingle |
Dinocysts Foraminifera Greenland Holocene Micropaleontology North-East Greenland Paleoceanography Polynyas Sirius water polynya Younger dryas Jackson, Rebecca Andreasen, Nanna Oksman, Mimmi Andersen, Thorbjørn J. Pearce, Christof Seidenkrantz, Marit Solveig Ribeiro, Sofia Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
topic_facet |
Dinocysts Foraminifera Greenland Holocene Micropaleontology North-East Greenland Paleoceanography Polynyas Sirius water polynya Younger dryas |
description |
The Fram Strait is one of the largest gateways through which meltwater and sea ice are exported to the subarctic North Atlantic, transiting the North-East Greenland shelf via the southward flowing East Greenland Current. Observations indicate a recent freshening of the East Greenland Current that may have implications for wider oceanic circulation regimes. The North-East Greenland shelf is an opportune region to assess these changes back through time. Paleoceanographic reconstructions from the North-East Greenland shelf are sparse and their temporal coverage is limited to the Holocene, limiting our ability to assess the impact of rapid climatic variations on marine conditions, such as during the Younger Dryas/Holocene transition. Here, we present data from a well-dated marine sediment core retrieved from the North-East Greenland shelf (74°N; east of Young Sound-Tyrolerfjord system) that captures the late Younger Dryas Stadial through to the Mid-Holocene at sub-centennial resolution. We apply a multi-proxy approach to reconstruct changes in productivity, surface and bottom ocean conditions. We show that at 74° N the presence of warm Atlantic waters on the inner North-East Greenland shelf was limited to the late Younger Dryas, as the Greenland Ice Sheet retreated landward and isostatic rebound caused the area to uplift. A unique dimension to this record is its location within one of the few biological hotspots on the East Greenland shelf today; the Sirius Water polynya. Archaeological studies indicate the polynya was forming as early as 4500 years ago, but nothing is known about its evolution from a marine perspective. Cooling of bottom waters, increasing sea-surface productivity and more frequent open water conditions indicate an Early Holocene onset of the Sirius Water (ca. 10–8.7 ka BP). |
format |
Article in Journal/Newspaper |
author |
Jackson, Rebecca Andreasen, Nanna Oksman, Mimmi Andersen, Thorbjørn J. Pearce, Christof Seidenkrantz, Marit Solveig Ribeiro, Sofia |
author_facet |
Jackson, Rebecca Andreasen, Nanna Oksman, Mimmi Andersen, Thorbjørn J. Pearce, Christof Seidenkrantz, Marit Solveig Ribeiro, Sofia |
author_sort |
Jackson, Rebecca |
title |
Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
title_short |
Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
title_full |
Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
title_fullStr |
Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
title_full_unstemmed |
Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene |
title_sort |
marine conditions and development of the sirius water polynya on the north-east greenland shelf during the younger dryas-holocene |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/marine-conditions-and-development-of-the-sirius-water-polynya-on-the-northeast-greenland-shelf-during-the-younger-dryasholocene(d4f06622-6609-4fee-8c17-ba84b9575bf5).html https://doi.org/10.1016/j.quascirev.2022.107647 https://pure.au.dk/ws/files/334896264/1_s2.0_S0277379122002785_main.pdf http://www.scopus.com/inward/record.url?scp=85135502948&partnerID=8YFLogxK |
genre |
East Greenland east greenland current Fram Strait Greenland Ice Sheet North Atlantic Sea ice Subarctic |
genre_facet |
East Greenland east greenland current Fram Strait Greenland Ice Sheet North Atlantic Sea ice Subarctic |
op_source |
Jackson , R , Andreasen , N , Oksman , M , Andersen , T J , Pearce , C , Seidenkrantz , M S & Ribeiro , S 2022 , ' Marine conditions and development of the Sirius Water polynya on the North-East Greenland shelf during the Younger Dryas-Holocene ' , Quaternary Science Reviews , vol. 291 , 107647 . https://doi.org/10.1016/j.quascirev.2022.107647 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2022.107647 |
container_title |
Quaternary Science Reviews |
container_volume |
291 |
container_start_page |
107647 |
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1781059549119119360 |