Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206
There is much uncertainty surrounding the mechanisms that forced the abrupt climate fluctuations found in many palaeoclimate records during Marine Isotope Stage (MIS)-3. One of the processes thought to be involved in these events is the Atlantic Meridional Overturning Circulation (MOC), which exhibi...
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ftdatacite:10.1594/pangaea.832405 2023-05-15T16:00:01+02:00 Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 Dickson, Alexander J Austin, William EN Hall, Ian R Maslin, Mark A Kucera, Michal 2008 application/zip https://dx.doi.org/10.1594/pangaea.832405 https://doi.pangaea.de/10.1594/PANGAEA.832405 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2008pa001595 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Calypso Corer MD101 Marion Dufresne 1995 article Supplementary Collection of Datasets Collection 2008 ftdatacite https://doi.org/10.1594/pangaea.832405 https://doi.org/10.1029/2008pa001595 2022-02-09T13:17:41Z There is much uncertainty surrounding the mechanisms that forced the abrupt climate fluctuations found in many palaeoclimate records during Marine Isotope Stage (MIS)-3. One of the processes thought to be involved in these events is the Atlantic Meridional Overturning Circulation (MOC), which exhibited large changes in its dominant mode throughout the last glacial period. Giant piston core MD95-2006 from the northeast Atlantic Ocean records a suite of palaeoceanographic proxies related to the activity of both surface and deep water masses through a period of MIS-3 when abrupt climate fluctuations were extremely pronounced. A two-stage progression of surface water warming during interstadial warm events is proposed, with initial warming related to the northward advection of a thin warm surface layer within the North Atlantic Current, which only extended into deeper surface layers as the interstadial progressed. Benthic foraminifera isotope data also show millennial-scale oscillations but of a different structure to the abrupt surface water changes. These changes are argued to partly be related to the influence of low-salinity deepwater brines. The influence of deepwater brines over the site of MD95-2006 reached a maximum at times of rapid warming of surface waters. This observation supports the suggestion that brine formation may have helped to destabilize the accumulation of warm, saline surface waters at low latitudes, helping to force the MOC into a warm mode of operation. The contribution of deepwater brines relative to other mechanisms proposed to alter the state of the MOC needs to be examined further in future studies. Article in Journal/Newspaper Dansgaard-Oeschger events north atlantic current North Atlantic Northeast Atlantic DataCite Metadata Store (German National Library of Science and Technology) Austin |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Calypso Corer MD101 Marion Dufresne 1995 |
spellingShingle |
Calypso Corer MD101 Marion Dufresne 1995 Dickson, Alexander J Austin, William EN Hall, Ian R Maslin, Mark A Kucera, Michal Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
topic_facet |
Calypso Corer MD101 Marion Dufresne 1995 |
description |
There is much uncertainty surrounding the mechanisms that forced the abrupt climate fluctuations found in many palaeoclimate records during Marine Isotope Stage (MIS)-3. One of the processes thought to be involved in these events is the Atlantic Meridional Overturning Circulation (MOC), which exhibited large changes in its dominant mode throughout the last glacial period. Giant piston core MD95-2006 from the northeast Atlantic Ocean records a suite of palaeoceanographic proxies related to the activity of both surface and deep water masses through a period of MIS-3 when abrupt climate fluctuations were extremely pronounced. A two-stage progression of surface water warming during interstadial warm events is proposed, with initial warming related to the northward advection of a thin warm surface layer within the North Atlantic Current, which only extended into deeper surface layers as the interstadial progressed. Benthic foraminifera isotope data also show millennial-scale oscillations but of a different structure to the abrupt surface water changes. These changes are argued to partly be related to the influence of low-salinity deepwater brines. The influence of deepwater brines over the site of MD95-2006 reached a maximum at times of rapid warming of surface waters. This observation supports the suggestion that brine formation may have helped to destabilize the accumulation of warm, saline surface waters at low latitudes, helping to force the MOC into a warm mode of operation. The contribution of deepwater brines relative to other mechanisms proposed to alter the state of the MOC needs to be examined further in future studies. |
format |
Article in Journal/Newspaper |
author |
Dickson, Alexander J Austin, William EN Hall, Ian R Maslin, Mark A Kucera, Michal |
author_facet |
Dickson, Alexander J Austin, William EN Hall, Ian R Maslin, Mark A Kucera, Michal |
author_sort |
Dickson, Alexander J |
title |
Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
title_short |
Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
title_full |
Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
title_fullStr |
Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
title_full_unstemmed |
Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006, supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark A; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206 |
title_sort |
centennial-scale evolution of dansgaard-oeschger events in sediment core md95-2006, supplement to: dickson, alexander j; austin, william en; hall, ian r; maslin, mark a; kucera, michal (2008): centennial-scale evolution of dansgaard-oeschger events in the northeast atlantic ocean between 39.5 and 56.5 ka b.p. paleoceanography, 23(3), pa3206 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2008 |
url |
https://dx.doi.org/10.1594/pangaea.832405 https://doi.pangaea.de/10.1594/PANGAEA.832405 |
geographic |
Austin |
geographic_facet |
Austin |
genre |
Dansgaard-Oeschger events north atlantic current North Atlantic Northeast Atlantic |
genre_facet |
Dansgaard-Oeschger events north atlantic current North Atlantic Northeast Atlantic |
op_relation |
https://dx.doi.org/10.1029/2008pa001595 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.832405 https://doi.org/10.1029/2008pa001595 |
_version_ |
1766395886606221312 |