The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow
Retreat of glacier ice from Nares Strait and other straits in the Canadian Arctic Archipelago after the end of the last Ice Age initiated an important connection between the Arctic and the North Atlantic Oceans, allowing development of modern ocean circulation in Baffin Bay and the Labrador Sea. As...
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ftoregonstate:ir.library.oregonstate.edu:hd76s1576 2024-04-14T08:05:42+00:00 The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow Jennings, Anne E. Sheldon, Christina Cronin, Thomas M. Francus, Pierre Stoner, Joseph Andrews, John https://ir.library.oregonstate.edu/concern/articles/hd76s1576 English [eng] eng unknown Oceanography Society https://ir.library.oregonstate.edu/concern/articles/hd76s1576 Copyright Not Evaluated Article ftoregonstate 2024-03-21T15:47:26Z Retreat of glacier ice from Nares Strait and other straits in the Canadian Arctic Archipelago after the end of the last Ice Age initiated an important connection between the Arctic and the North Atlantic Oceans, allowing development of modern ocean circulation in Baffin Bay and the Labrador Sea. As low-salinity, nutrient-rich Arctic Water began to enter Baffin Bay, it contributed to the Baffin and Labrador currents flowing southward. This enhanced freshwater inflow must have influenced the sea ice regime and likely is responsible for poor calcium carbonate preservation that characterizes the Baffin Island margin today. Sedimentologic and paleoceanographic data from radiocarbon-dated core HLY03-05GC, Hall Basin, northern Nares Strait, document the timing and paleoenvironments surrounding the retreat of waning ice sheets from Nares Strait and opening of this connection between the Arctic Ocean and Baffin Bay. Hall Basin was deglaciated soon before 10,300 cal BP (calibrated years before present) and records ice-distal sedimentation in a glacial bay facing the Arctic Ocean until about 9,000 cal BP. Atlantic Water was present in Hall Basin during deglaciation, suggesting that it may have promoted ice retreat. A transitional unit with high ice-rafted debris content records the opening of Nares Strait at approximately 9,000 cal BP. High productivity in Hall Basin between 9,000 and 6,000 cal BP reflects reduced sea ice cover and duration as well as throughflow of nutrient-rich Pacific Water. The later Holocene is poorly resolved in the core, but slow sedimentation rates and heavier carbon isotope values support an interpretation of increased sea ice cover and decreased productivity during the Neoglacial period. This is the publisher's version of record. The original submission is copyrighted by Oceanography Society and can be found here: http://www.tos.org/ Article in Journal/Newspaper Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Island Baffin Canadian Arctic Archipelago Hall Basin Labrador Sea Nares strait North Atlantic Sea ice ScholarsArchive@OSU (Oregon State University) Arctic Arctic Ocean Baffin Bay Baffin Island Canadian Arctic Archipelago Pacific Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Hall Basin ENVELOPE(-62.992,-62.992,81.502,81.502) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
language |
English unknown |
description |
Retreat of glacier ice from Nares Strait and other straits in the Canadian Arctic Archipelago after the end of the last Ice Age initiated an important connection between the Arctic and the North Atlantic Oceans, allowing development of modern ocean circulation in Baffin Bay and the Labrador Sea. As low-salinity, nutrient-rich Arctic Water began to enter Baffin Bay, it contributed to the Baffin and Labrador currents flowing southward. This enhanced freshwater inflow must have influenced the sea ice regime and likely is responsible for poor calcium carbonate preservation that characterizes the Baffin Island margin today. Sedimentologic and paleoceanographic data from radiocarbon-dated core HLY03-05GC, Hall Basin, northern Nares Strait, document the timing and paleoenvironments surrounding the retreat of waning ice sheets from Nares Strait and opening of this connection between the Arctic Ocean and Baffin Bay. Hall Basin was deglaciated soon before 10,300 cal BP (calibrated years before present) and records ice-distal sedimentation in a glacial bay facing the Arctic Ocean until about 9,000 cal BP. Atlantic Water was present in Hall Basin during deglaciation, suggesting that it may have promoted ice retreat. A transitional unit with high ice-rafted debris content records the opening of Nares Strait at approximately 9,000 cal BP. High productivity in Hall Basin between 9,000 and 6,000 cal BP reflects reduced sea ice cover and duration as well as throughflow of nutrient-rich Pacific Water. The later Holocene is poorly resolved in the core, but slow sedimentation rates and heavier carbon isotope values support an interpretation of increased sea ice cover and decreased productivity during the Neoglacial period. This is the publisher's version of record. The original submission is copyrighted by Oceanography Society and can be found here: http://www.tos.org/ |
format |
Article in Journal/Newspaper |
author |
Jennings, Anne E. Sheldon, Christina Cronin, Thomas M. Francus, Pierre Stoner, Joseph Andrews, John |
spellingShingle |
Jennings, Anne E. Sheldon, Christina Cronin, Thomas M. Francus, Pierre Stoner, Joseph Andrews, John The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
author_facet |
Jennings, Anne E. Sheldon, Christina Cronin, Thomas M. Francus, Pierre Stoner, Joseph Andrews, John |
author_sort |
Jennings, Anne E. |
title |
The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
title_short |
The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
title_full |
The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
title_fullStr |
The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
title_full_unstemmed |
The Holocene History of Nares Strait: Transition from Glacial Bay to Arctic-Atlantic Throughflow |
title_sort |
holocene history of nares strait: transition from glacial bay to arctic-atlantic throughflow |
publisher |
Oceanography Society |
url |
https://ir.library.oregonstate.edu/concern/articles/hd76s1576 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-62.992,-62.992,81.502,81.502) |
geographic |
Arctic Arctic Ocean Baffin Bay Baffin Island Canadian Arctic Archipelago Pacific Nares Hall Basin |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Baffin Island Canadian Arctic Archipelago Pacific Nares Hall Basin |
genre |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Island Baffin Canadian Arctic Archipelago Hall Basin Labrador Sea Nares strait North Atlantic Sea ice |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Island Baffin Canadian Arctic Archipelago Hall Basin Labrador Sea Nares strait North Atlantic Sea ice |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/hd76s1576 |
op_rights |
Copyright Not Evaluated |
_version_ |
1796302329269452800 |