Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum
Abstract The Last Glacial Maximum (LGM, 23–19,000 year BP) designates a period of extensive glacial extent and very cold conditions on the Northern Hemisphere. The strength of ocean circulation during this period has been highly debated. Based on investigations of two marine sediment cores from the...
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2021
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crspringernat:10.1038/s41598-021-86224-z 2023-05-15T16:00:13+02:00 Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum Seidenkrantz, Marit-Solveig Kuijpers, Antoon Aagaard-Sørensen, Steffen Lindgreen, Holger Olsen, Jesper Pearce, Christof Natur og Univers, Det Frie Forskningsråd Aarhus Universitets Forskningsfond 2021 http://dx.doi.org/10.1038/s41598-021-86224-z http://www.nature.com/articles/s41598-021-86224-z.pdf http://www.nature.com/articles/s41598-021-86224-z en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-86224-z 2022-01-04T10:29:17Z Abstract The Last Glacial Maximum (LGM, 23–19,000 year BP) designates a period of extensive glacial extent and very cold conditions on the Northern Hemisphere. The strength of ocean circulation during this period has been highly debated. Based on investigations of two marine sediment cores from the Davis Strait (1033 m water depth) and the northern Labrador Sea (2381 m), we demonstrate a significant influx of Atlantic-sourced water at both subsurface and intermediate depths during the LGM. Although surface-water conditions were cold and sea-ice loaded, the lower strata of the (proto) West Greenland Current carried a significant Atlantic (Irminger Sea-derived) Water signal, while at the deeper site the sea floor was swept by a water mass comparable with present Northeast Atlantic Deep Water. The persistent influx of these Atlantic-sourced waters entrained by boundary currents off SW Greenland demonstrates an active Atlantic Meridional Overturning Circulation during the LGM. Immediately after the LGM, deglaciation was characterized by a prominent deep-water ventilation event and potentially Labrador Sea Water formation, presumably related to brine formation and/or hyperpycnal meltwater flows. This was followed by a major re-arrangement of deep-water masses most likely linked to increased overflow at the Greenland-Scotland Ridge after ca 15 kyr BP. Article in Journal/Newspaper Davis Strait Greenland Greenland-Scotland Ridge Labrador Sea Northeast Atlantic Sea ice Springer Nature (via Crossref) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Scientific Reports 11 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Multidisciplinary |
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Multidisciplinary Seidenkrantz, Marit-Solveig Kuijpers, Antoon Aagaard-Sørensen, Steffen Lindgreen, Holger Olsen, Jesper Pearce, Christof Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
topic_facet |
Multidisciplinary |
description |
Abstract The Last Glacial Maximum (LGM, 23–19,000 year BP) designates a period of extensive glacial extent and very cold conditions on the Northern Hemisphere. The strength of ocean circulation during this period has been highly debated. Based on investigations of two marine sediment cores from the Davis Strait (1033 m water depth) and the northern Labrador Sea (2381 m), we demonstrate a significant influx of Atlantic-sourced water at both subsurface and intermediate depths during the LGM. Although surface-water conditions were cold and sea-ice loaded, the lower strata of the (proto) West Greenland Current carried a significant Atlantic (Irminger Sea-derived) Water signal, while at the deeper site the sea floor was swept by a water mass comparable with present Northeast Atlantic Deep Water. The persistent influx of these Atlantic-sourced waters entrained by boundary currents off SW Greenland demonstrates an active Atlantic Meridional Overturning Circulation during the LGM. Immediately after the LGM, deglaciation was characterized by a prominent deep-water ventilation event and potentially Labrador Sea Water formation, presumably related to brine formation and/or hyperpycnal meltwater flows. This was followed by a major re-arrangement of deep-water masses most likely linked to increased overflow at the Greenland-Scotland Ridge after ca 15 kyr BP. |
author2 |
Natur og Univers, Det Frie Forskningsråd Aarhus Universitets Forskningsfond |
format |
Article in Journal/Newspaper |
author |
Seidenkrantz, Marit-Solveig Kuijpers, Antoon Aagaard-Sørensen, Steffen Lindgreen, Holger Olsen, Jesper Pearce, Christof |
author_facet |
Seidenkrantz, Marit-Solveig Kuijpers, Antoon Aagaard-Sørensen, Steffen Lindgreen, Holger Olsen, Jesper Pearce, Christof |
author_sort |
Seidenkrantz, Marit-Solveig |
title |
Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
title_short |
Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
title_full |
Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
title_fullStr |
Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
title_full_unstemmed |
Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
title_sort |
evidence for influx of atlantic water masses to the labrador sea during the last glacial maximum |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-86224-z http://www.nature.com/articles/s41598-021-86224-z.pdf http://www.nature.com/articles/s41598-021-86224-z |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea |
geographic_facet |
Greenland Irminger Sea |
genre |
Davis Strait Greenland Greenland-Scotland Ridge Labrador Sea Northeast Atlantic Sea ice |
genre_facet |
Davis Strait Greenland Greenland-Scotland Ridge Labrador Sea Northeast Atlantic Sea ice |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-86224-z |
container_title |
Scientific Reports |
container_volume |
11 |
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1 |
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1766396111999729664 |