Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait
The western Fram Strait is the only deep-water gateway connecting the Arctic Ocean and North Atlantic. Consequently, today, the western Fram Strait and the Northeast Greenland shelf receive cold, low saline Polar and Arctic Atlantic waters from the Arctic Ocean incorporated in the East Greenland Cur...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/568660 2023-05-15T14:56:40+02:00 Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait Elnegaard Hansen, Katrine Lorenzen, Jesper Davies, Joanna Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig 2022-10-01 application/application/pdf https://hdl.handle.net/20.500.11850/568660 https://doi.org/10.3929/ethz-b-000568660 en eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2022.107704 info:eu-repo/semantics/altIdentifier/wos/000889120500008 http://hdl.handle.net/20.500.11850/568660 doi:10.3929/ethz-b-000568660 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY Quaternary Science Reviews, 293 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftethz https://doi.org/20.500.11850/568660 https://doi.org/10.3929/ethz-b-000568660 https://doi.org/10.1016/j.quascirev.2022.107704 2023-02-13T01:11:10Z The western Fram Strait is the only deep-water gateway connecting the Arctic Ocean and North Atlantic. Consequently, today, the western Fram Strait and the Northeast Greenland shelf receive cold, low saline Polar and Arctic Atlantic waters from the Arctic Ocean incorporated in the East Greenland Current, together with warmer, saline recirculated Atlantic Water masses derived from the West Spitsbergen Current. We present a multiproxy study (grain size distribution, XRF core scans, and benthic foraminiferal assemblages) based on the lower part of the radiocarbon dated marine sediment core DA17-NG-ST03-039G, covering the period from 13.3 to 3.9 cal ka BP. We reconstruct the deglacial conditions of the Northeast Greenland shelf together with Early to Mid Holocene fluctuations in subsurface Atlantic Water and Polar Water advection. The results show that the outer Northeast Greenland shelf was deglaciated and marine conditions were established prior to c. 13.3 cal ka BP. At this time, our data show Atlantic Water masses flowing beneath an extensive sea-ice cover in a glaciomarine setting, potentially related to the Bølling-Allerød warm period. Around 12.9 cal ka BP, the onset of high surface and bottom water productivity may be associated with the Younger Dryas onset. This was followed by a transition towards warmer bottom and subsurface water conditions from c. 11.7 until 10.2 cal ka BP caused by enhanced advection of Atlantic-derived water masses. A cold period with marginal ice zone conditions and enhanced East Greenland Current incursion is evident from 10.2 to 9.4 cal ka BP, succeeded by harsher sea-ice conditions and Atlantic Water inflow, prevailing until c. 7.5 cal ka BP. Holocene Thermal Maximum conditions, characterized by high surface and subsurface water productivity, were promoted by enhanced Atlantic Water flow to the shelf from c. 7.5 to 6.7 cal ka BP. In contrast, the transition towards a cold period with increased drift-ice transport via a strong East Greenland Current is recorded from c. 6.2 cal ka ... Article in Journal/Newspaper Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Fram Strait Greenland North Atlantic Sea ice Spitsbergen ETH Zürich Research Collection Arctic Arctic Ocean Greenland |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
description |
The western Fram Strait is the only deep-water gateway connecting the Arctic Ocean and North Atlantic. Consequently, today, the western Fram Strait and the Northeast Greenland shelf receive cold, low saline Polar and Arctic Atlantic waters from the Arctic Ocean incorporated in the East Greenland Current, together with warmer, saline recirculated Atlantic Water masses derived from the West Spitsbergen Current. We present a multiproxy study (grain size distribution, XRF core scans, and benthic foraminiferal assemblages) based on the lower part of the radiocarbon dated marine sediment core DA17-NG-ST03-039G, covering the period from 13.3 to 3.9 cal ka BP. We reconstruct the deglacial conditions of the Northeast Greenland shelf together with Early to Mid Holocene fluctuations in subsurface Atlantic Water and Polar Water advection. The results show that the outer Northeast Greenland shelf was deglaciated and marine conditions were established prior to c. 13.3 cal ka BP. At this time, our data show Atlantic Water masses flowing beneath an extensive sea-ice cover in a glaciomarine setting, potentially related to the Bølling-Allerød warm period. Around 12.9 cal ka BP, the onset of high surface and bottom water productivity may be associated with the Younger Dryas onset. This was followed by a transition towards warmer bottom and subsurface water conditions from c. 11.7 until 10.2 cal ka BP caused by enhanced advection of Atlantic-derived water masses. A cold period with marginal ice zone conditions and enhanced East Greenland Current incursion is evident from 10.2 to 9.4 cal ka BP, succeeded by harsher sea-ice conditions and Atlantic Water inflow, prevailing until c. 7.5 cal ka BP. Holocene Thermal Maximum conditions, characterized by high surface and subsurface water productivity, were promoted by enhanced Atlantic Water flow to the shelf from c. 7.5 to 6.7 cal ka BP. In contrast, the transition towards a cold period with increased drift-ice transport via a strong East Greenland Current is recorded from c. 6.2 cal ka ... |
format |
Article in Journal/Newspaper |
author |
Elnegaard Hansen, Katrine Lorenzen, Jesper Davies, Joanna Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig |
spellingShingle |
Elnegaard Hansen, Katrine Lorenzen, Jesper Davies, Joanna Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
author_facet |
Elnegaard Hansen, Katrine Lorenzen, Jesper Davies, Joanna Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig |
author_sort |
Elnegaard Hansen, Katrine |
title |
Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
title_short |
Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
title_full |
Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
title_fullStr |
Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
title_full_unstemmed |
Deglacial to Mid Holocene environmental conditions on the northeastern Greenland shelf, western Fram Strait |
title_sort |
deglacial to mid holocene environmental conditions on the northeastern greenland shelf, western fram strait |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11850/568660 https://doi.org/10.3929/ethz-b-000568660 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Fram Strait Greenland North Atlantic Sea ice Spitsbergen |
genre_facet |
Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Fram Strait Greenland North Atlantic Sea ice Spitsbergen |
op_source |
Quaternary Science Reviews, 293 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2022.107704 info:eu-repo/semantics/altIdentifier/wos/000889120500008 http://hdl.handle.net/20.500.11850/568660 doi:10.3929/ethz-b-000568660 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/568660 https://doi.org/10.3929/ethz-b-000568660 https://doi.org/10.1016/j.quascirev.2022.107704 |
_version_ |
1766328753959469056 |