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...
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2022
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Online Access: | https://zenodo.org/record/7244548 https://doi.org/10.1016/j.quascirev.2022.107647 |
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ftzenodo:oai:zenodo.org:7244548 2023-06-11T04:11:21+02:00 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 2022-09-01 https://zenodo.org/record/7244548 https://doi.org/10.1016/j.quascirev.2022.107647 eng eng info:eu-repo/grantAgreement/EC/H2020/869383/ https://zenodo.org/record/7244548 https://doi.org/10.1016/j.quascirev.2022.107647 oai:zenodo.org:7244548 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Quaternary Science Reviews 291 107647 Holocene Younger Dryas Paleoceanography Micropaleontology Dinocysts Foraminifera Greenland North-East Greenland Polynyas Sirius water polynya info:eu-repo/semantics/article publication-article 2022 ftzenodo https://doi.org/10.1016/j.quascirev.2022.107647 2023-05-30T22:57:52Z 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 (74N; 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. 10e8.7 ka BP). Article in Journal/Newspaper East Greenland east greenland current Fram Strait Greenland Ice Sheet North Atlantic Sea ice Subarctic Zenodo Greenland Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Tyrolerfjord ENVELOPE(-21.883,-21.883,74.517,74.517) Quaternary Science Reviews 291 107647 |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
English |
topic |
Holocene Younger Dryas Paleoceanography Micropaleontology Dinocysts Foraminifera Greenland North-East Greenland Polynyas Sirius water polynya |
spellingShingle |
Holocene Younger Dryas Paleoceanography Micropaleontology Dinocysts Foraminifera Greenland North-East Greenland Polynyas Sirius water polynya 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 |
Holocene Younger Dryas Paleoceanography Micropaleontology Dinocysts Foraminifera Greenland North-East Greenland Polynyas Sirius water polynya |
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 (74N; 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. 10e8.7 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://zenodo.org/record/7244548 https://doi.org/10.1016/j.quascirev.2022.107647 |
long_lat |
ENVELOPE(163.250,163.250,-84.133,-84.133) ENVELOPE(-21.883,-21.883,74.517,74.517) |
geographic |
Greenland Sirius Tyrolerfjord |
geographic_facet |
Greenland Sirius Tyrolerfjord |
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 |
Quaternary Science Reviews 291 107647 |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/869383/ https://zenodo.org/record/7244548 https://doi.org/10.1016/j.quascirev.2022.107647 oai:zenodo.org:7244548 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
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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1768386322897043456 |