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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ftdoajarticles:oai:doaj.org/article:987d5132d86f4a4eb951c9a1a7b4b410 2023-05-15T16:00:13+02:00 Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum Marit-Solveig Seidenkrantz Antoon Kuijpers Steffen Aagaard-Sørensen Holger Lindgreen Jesper Olsen Christof Pearce 2021-03-01T00:00:00Z https://doi.org/10.1038/s41598-021-86224-z https://doaj.org/article/987d5132d86f4a4eb951c9a1a7b4b410 EN eng Nature Portfolio https://doi.org/10.1038/s41598-021-86224-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-86224-z 2045-2322 https://doaj.org/article/987d5132d86f4a4eb951c9a1a7b4b410 Scientific Reports, Vol 11, Iss 1, Pp 1-14 (2021) Medicine R Science Q article 2021 ftdoajarticles https://doi.org/10.1038/s41598-021-86224-z 2022-12-31T13:55:50Z 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 Directory of Open Access Journals: DOAJ Articles Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Scientific Reports 11 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Medicine R Science Q Marit-Solveig Seidenkrantz Antoon Kuijpers Steffen Aagaard-Sørensen Holger Lindgreen Jesper Olsen Christof Pearce Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
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Medicine R Science Q |
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. |
format |
Article in Journal/Newspaper |
author |
Marit-Solveig Seidenkrantz Antoon Kuijpers Steffen Aagaard-Sørensen Holger Lindgreen Jesper Olsen Christof Pearce |
author_facet |
Marit-Solveig Seidenkrantz Antoon Kuijpers Steffen Aagaard-Sørensen Holger Lindgreen Jesper Olsen Christof Pearce |
author_sort |
Marit-Solveig Seidenkrantz |
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 |
Nature Portfolio |
publishDate |
2021 |
url |
https://doi.org/10.1038/s41598-021-86224-z https://doaj.org/article/987d5132d86f4a4eb951c9a1a7b4b410 |
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, Vol 11, Iss 1, Pp 1-14 (2021) |
op_relation |
https://doi.org/10.1038/s41598-021-86224-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-86224-z 2045-2322 https://doaj.org/article/987d5132d86f4a4eb951c9a1a7b4b410 |
op_doi |
https://doi.org/10.1038/s41598-021-86224-z |
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Scientific Reports |
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11 |
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1766396110095515648 |