Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells
Nares Strait is one of three main passages of the Canadian Archipelago that channel relatively fresh seawater from the Arctic Ocean through Baffin Bay to the Labrador Sea. Oxygen isotopic profiles along the growth axis of bivalve shells, collected live over the 5 – 30 m depth range from the Greenlan...
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The Arctic Institute of North America
2011
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crarcticinstna:10.14430/arctic4079 2024-06-09T07:42:07+00:00 Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells Torres, Marta E. Zima, Daniela Falkner, Kelly K. Macdonald, Robie W. O'Brien, Mary Schöne, Bernd R. Siferd, Tim 2011 http://dx.doi.org/10.14430/arctic4079 http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/viewFile/4079/4052 unknown The Arctic Institute of North America ARCTIC volume 64, issue 1, page 45 ISSN 1923-1245 0004-0843 journal-article 2011 crarcticinstna https://doi.org/10.14430/arctic4079 2024-05-14T12:53:42Z Nares Strait is one of three main passages of the Canadian Archipelago that channel relatively fresh seawater from the Arctic Ocean through Baffin Bay to the Labrador Sea. Oxygen isotopic profiles along the growth axis of bivalve shells, collected live over the 5 – 30 m depth range from the Greenland and Ellesmere Island sides of the strait, were used to reconstruct changes in the hydrography of the region over the past century. The variability in oxygen isotope ratios is mainly attributed to variations in salinity and suggests that the northern end of Nares Strait has been experiencing an increase in freshwater runoff since the mid 1980s. The recent changes are most pronounced at the northern end of the strait and diminish toward the south, a pattern consistent with proximity to the apparently freshening Arctic Ocean source in the north and mixing with Baffin Bay waters as the water progresses southward. This increasing freshwater signal may reflect changes in circulation and ice formation that favor an increased flow of relatively fresh waters from the Arctic Ocean into Nares Strait. Article in Journal/Newspaper Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Archipelago Canadian Arctic Archipelago Ellesmere Island Greenland Labrador Sea Nares strait Arctic Institute of North America Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Ellesmere Island Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) ARCTIC 64 1 45 |
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Open Polar |
collection |
Arctic Institute of North America |
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crarcticinstna |
language |
unknown |
description |
Nares Strait is one of three main passages of the Canadian Archipelago that channel relatively fresh seawater from the Arctic Ocean through Baffin Bay to the Labrador Sea. Oxygen isotopic profiles along the growth axis of bivalve shells, collected live over the 5 – 30 m depth range from the Greenland and Ellesmere Island sides of the strait, were used to reconstruct changes in the hydrography of the region over the past century. The variability in oxygen isotope ratios is mainly attributed to variations in salinity and suggests that the northern end of Nares Strait has been experiencing an increase in freshwater runoff since the mid 1980s. The recent changes are most pronounced at the northern end of the strait and diminish toward the south, a pattern consistent with proximity to the apparently freshening Arctic Ocean source in the north and mixing with Baffin Bay waters as the water progresses southward. This increasing freshwater signal may reflect changes in circulation and ice formation that favor an increased flow of relatively fresh waters from the Arctic Ocean into Nares Strait. |
format |
Article in Journal/Newspaper |
author |
Torres, Marta E. Zima, Daniela Falkner, Kelly K. Macdonald, Robie W. O'Brien, Mary Schöne, Bernd R. Siferd, Tim |
spellingShingle |
Torres, Marta E. Zima, Daniela Falkner, Kelly K. Macdonald, Robie W. O'Brien, Mary Schöne, Bernd R. Siferd, Tim Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
author_facet |
Torres, Marta E. Zima, Daniela Falkner, Kelly K. Macdonald, Robie W. O'Brien, Mary Schöne, Bernd R. Siferd, Tim |
author_sort |
Torres, Marta E. |
title |
Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
title_short |
Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
title_full |
Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
title_fullStr |
Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
title_full_unstemmed |
Hydrographic Changes in Nares Strait (Canadian Arctic Archipelago) in Recent Decades Based on δ18O Profiles of Bivalve Shells |
title_sort |
hydrographic changes in nares strait (canadian arctic archipelago) in recent decades based on δ18o profiles of bivalve shells |
publisher |
The Arctic Institute of North America |
publishDate |
2011 |
url |
http://dx.doi.org/10.14430/arctic4079 http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/viewFile/4079/4052 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Ellesmere Island Greenland Nares |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Ellesmere Island Greenland Nares |
genre |
Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Archipelago Canadian Arctic Archipelago Ellesmere Island Greenland Labrador Sea Nares strait |
genre_facet |
Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Archipelago Canadian Arctic Archipelago Ellesmere Island Greenland Labrador Sea Nares strait |
op_source |
ARCTIC volume 64, issue 1, page 45 ISSN 1923-1245 0004-0843 |
op_doi |
https://doi.org/10.14430/arctic4079 |
container_title |
ARCTIC |
container_volume |
64 |
container_issue |
1 |
container_start_page |
45 |
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1801371029905342464 |