Holocene oceanographic changes in SW Labrador Sea, off Newfoundland
Benthic foraminiferal assemblages supported by selected geochemical data from three marine sediment cores collected in Placentia Bay, SE Newfoundland, are used to construct an ~13,000-year-long record of regional oceanographic changes in the SW Labrador Sea. The area is located in the boundary zone...
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crsagepubl:10.1177/0959683615608690 2023-05-15T15:10:18+02:00 Holocene oceanographic changes in SW Labrador Sea, off Newfoundland Sheldon, Christina M Seidenkrantz, Marit-Solveig Pearce, Christof Kuijpers, Antoon Hansen, Mette J Christensen, Eva Zilmer 2015 http://dx.doi.org/10.1177/0959683615608690 http://journals.sagepub.com/doi/pdf/10.1177/0959683615608690 http://journals.sagepub.com/doi/full-xml/10.1177/0959683615608690 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 26, issue 2, page 274-289 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2015 crsagepubl https://doi.org/10.1177/0959683615608690 2022-07-03T16:09:28Z Benthic foraminiferal assemblages supported by selected geochemical data from three marine sediment cores collected in Placentia Bay, SE Newfoundland, are used to construct an ~13,000-year-long record of regional oceanographic changes in the SW Labrador Sea. The area is located in the boundary zone between the cold, ice-loaded Labrador Current (LC) in the north and the warm Gulf Stream (GS) waters to the south. After the Younger Dryas termination, the influence of GS-derived water increased and was further strengthened at 10.7 cal. kyr BP through enhanced northward flow of Atlantic water via the Slopewater Current. A short-term event of increased terrestrial input and water column stratification at 8.4 cal. kyr BP was likely linked to the distal drainage of glacial Lake Agassiz. After 7.3 cal. kyr BP, a stronger LC weakened the inflow of warmer subsurface waters from the GS. This may be explained by extensive meltwater release from ice sheets in Arctic Canada and is concurrent with a general shift in oceanographic conditions in the Labrador Sea region. Around 4.0 cal. kyr BP, conditions became more stable with a slight increase in salinity, indicating a decrease in meltwater transported via the LC. The Northern Hemisphere neoglacial cooling around 2.8 cal. kyr BP was characterized off SE Newfoundland by a further stabilization of the current system, dominated by the LC with some continued influx of GS water. Article in Journal/Newspaper Arctic Foraminifera* Labrador Sea Newfoundland SAGE Publications (via Crossref) Arctic Canada Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Newfoundland The Holocene 26 2 274 289 |
institution |
Open Polar |
collection |
SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Sheldon, Christina M Seidenkrantz, Marit-Solveig Pearce, Christof Kuijpers, Antoon Hansen, Mette J Christensen, Eva Zilmer Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
Benthic foraminiferal assemblages supported by selected geochemical data from three marine sediment cores collected in Placentia Bay, SE Newfoundland, are used to construct an ~13,000-year-long record of regional oceanographic changes in the SW Labrador Sea. The area is located in the boundary zone between the cold, ice-loaded Labrador Current (LC) in the north and the warm Gulf Stream (GS) waters to the south. After the Younger Dryas termination, the influence of GS-derived water increased and was further strengthened at 10.7 cal. kyr BP through enhanced northward flow of Atlantic water via the Slopewater Current. A short-term event of increased terrestrial input and water column stratification at 8.4 cal. kyr BP was likely linked to the distal drainage of glacial Lake Agassiz. After 7.3 cal. kyr BP, a stronger LC weakened the inflow of warmer subsurface waters from the GS. This may be explained by extensive meltwater release from ice sheets in Arctic Canada and is concurrent with a general shift in oceanographic conditions in the Labrador Sea region. Around 4.0 cal. kyr BP, conditions became more stable with a slight increase in salinity, indicating a decrease in meltwater transported via the LC. The Northern Hemisphere neoglacial cooling around 2.8 cal. kyr BP was characterized off SE Newfoundland by a further stabilization of the current system, dominated by the LC with some continued influx of GS water. |
format |
Article in Journal/Newspaper |
author |
Sheldon, Christina M Seidenkrantz, Marit-Solveig Pearce, Christof Kuijpers, Antoon Hansen, Mette J Christensen, Eva Zilmer |
author_facet |
Sheldon, Christina M Seidenkrantz, Marit-Solveig Pearce, Christof Kuijpers, Antoon Hansen, Mette J Christensen, Eva Zilmer |
author_sort |
Sheldon, Christina M |
title |
Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
title_short |
Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
title_full |
Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
title_fullStr |
Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
title_full_unstemmed |
Holocene oceanographic changes in SW Labrador Sea, off Newfoundland |
title_sort |
holocene oceanographic changes in sw labrador sea, off newfoundland |
publisher |
SAGE Publications |
publishDate |
2015 |
url |
http://dx.doi.org/10.1177/0959683615608690 http://journals.sagepub.com/doi/pdf/10.1177/0959683615608690 http://journals.sagepub.com/doi/full-xml/10.1177/0959683615608690 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Arctic Canada Glacial Lake Newfoundland |
geographic_facet |
Arctic Canada Glacial Lake Newfoundland |
genre |
Arctic Foraminifera* Labrador Sea Newfoundland |
genre_facet |
Arctic Foraminifera* Labrador Sea Newfoundland |
op_source |
The Holocene volume 26, issue 2, page 274-289 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683615608690 |
container_title |
The Holocene |
container_volume |
26 |
container_issue |
2 |
container_start_page |
274 |
op_container_end_page |
289 |
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1766341350612008960 |