Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum
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 Str...
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ftunivtroemsoe:oai:munin.uit.no:10037/21051 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 Sørensen, Steffen Aagaard Lindgreen, Holger Olsen, Jesper Pearce, Christof 2021-03-21 https://hdl.handle.net/10037/21051 https://doi.org/10.1038/s41598-021-86224-z eng eng Springer Nature Scientific Reports Seidenkrantz M, Kuijpers A, Sørensen SA, Lindgreen, Olsen J, Pearce C. Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum. Scientific Reports. 2021;11(6788) FRIDAID 1902463 doi:10.1038/s41598-021-86224-z 2045-2322 https://hdl.handle.net/10037/21051 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1038/s41598-021-86224-z 2021-06-25T17:58:09Z 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 University of Tromsø: Munin Open Research Archive Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Scientific Reports 11 1 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Seidenkrantz, Marit-Solveig Kuijpers, Antoon Sørensen, Steffen Aagaard Lindgreen, Holger Olsen, Jesper Pearce, Christof Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 |
description |
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 |
Seidenkrantz, Marit-Solveig Kuijpers, Antoon Sørensen, Steffen Aagaard Lindgreen, Holger Olsen, Jesper Pearce, Christof |
author_facet |
Seidenkrantz, Marit-Solveig Kuijpers, Antoon Sørensen, Steffen Aagaard 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 Nature |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/21051 https://doi.org/10.1038/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_relation |
Scientific Reports Seidenkrantz M, Kuijpers A, Sørensen SA, Lindgreen, Olsen J, Pearce C. Evidence for influx of Atlantic water masses to the Labrador Sea during the Last Glacial Maximum. Scientific Reports. 2021;11(6788) FRIDAID 1902463 doi:10.1038/s41598-021-86224-z 2045-2322 https://hdl.handle.net/10037/21051 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1038/s41598-021-86224-z |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766396113843126272 |