Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean
International audience The compilation of changes in the magnetic properties at various sites distributed along the path of the deepwater mass in North Atlantic shows large-amplitude short-term fluctuations reflecting changes in the strength of the North Atlantic Deep Water (NADW). These changes, wh...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://hal.science/hal-03192906 https://hal.science/hal-03192906/document https://hal.science/hal-03192906/file/2008PA001624.pdf https://doi.org/10.1029/2008PA001624 |
id |
ftinsu:oai:HAL:hal-03192906v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-03192906v1 2024-04-28T08:21:17+00:00 Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean Kissel, Catherine Laj, Carlo Piotrowski, Alexander Goldstein, Steven Hemming, Sidney Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2008-06 https://hal.science/hal-03192906 https://hal.science/hal-03192906/document https://hal.science/hal-03192906/file/2008PA001624.pdf https://doi.org/10.1029/2008PA001624 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008PA001624 hal-03192906 https://hal.science/hal-03192906 https://hal.science/hal-03192906/document https://hal.science/hal-03192906/file/2008PA001624.pdf doi:10.1029/2008PA001624 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03192906 Paleoceanography, 2008, 23 (2), pp.n/a-n/a. ⟨10.1029/2008PA001624⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2008 ftinsu https://doi.org/10.1029/2008PA001624 2024-04-05T00:37:31Z International audience The compilation of changes in the magnetic properties at various sites distributed along the path of the deepwater mass in North Atlantic shows large-amplitude short-term fluctuations reflecting changes in the strength of the North Atlantic Deep Water (NADW). These changes, which suggest a two-mode deep glacial circulation dynamic, are perfectly concurrent with air temperature changes over Greenland. They also share a similar pattern with those reported in the Nd isotope ratios from the deep Cape Basin during the same time period. Greenland interstadials were accompanied by increased flow speed of NADW and relatively more NADW reaching the Southern Ocean, while during Greenland stadials and Heinrich events, both the North Atlantic flow speed of NADW and its presence in the South Atlantic were reduced. It is demonstrated that both proxies are tracing the same water mass, and their reliability for monitoring changes in the deepwater circulation is therefore clearly established. After using the climatically independent geomagnetic assisted stratigraphy to put the Northern and Southern Hemisphere records on the same age scale, the South Atlantic record appears to lag changes in North Atlantic flow speeds by approximately 860 ± 220 years during the most prominent and best defined cycles (interstadials 12 and 8). Although future work is needed, this significant offset provides a first observation and tentative quantification of the time needed for glacial northern component water to mix downward and to flow from the North to the South Atlantic. Article in Journal/Newspaper Greenland NADW North Atlantic Deep Water North Atlantic Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Paleoceanography 23 2 n/a n/a |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Kissel, Catherine Laj, Carlo Piotrowski, Alexander Goldstein, Steven Hemming, Sidney Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The compilation of changes in the magnetic properties at various sites distributed along the path of the deepwater mass in North Atlantic shows large-amplitude short-term fluctuations reflecting changes in the strength of the North Atlantic Deep Water (NADW). These changes, which suggest a two-mode deep glacial circulation dynamic, are perfectly concurrent with air temperature changes over Greenland. They also share a similar pattern with those reported in the Nd isotope ratios from the deep Cape Basin during the same time period. Greenland interstadials were accompanied by increased flow speed of NADW and relatively more NADW reaching the Southern Ocean, while during Greenland stadials and Heinrich events, both the North Atlantic flow speed of NADW and its presence in the South Atlantic were reduced. It is demonstrated that both proxies are tracing the same water mass, and their reliability for monitoring changes in the deepwater circulation is therefore clearly established. After using the climatically independent geomagnetic assisted stratigraphy to put the Northern and Southern Hemisphere records on the same age scale, the South Atlantic record appears to lag changes in North Atlantic flow speeds by approximately 860 ± 220 years during the most prominent and best defined cycles (interstadials 12 and 8). Although future work is needed, this significant offset provides a first observation and tentative quantification of the time needed for glacial northern component water to mix downward and to flow from the North to the South Atlantic. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Kissel, Catherine Laj, Carlo Piotrowski, Alexander Goldstein, Steven Hemming, Sidney |
author_facet |
Kissel, Catherine Laj, Carlo Piotrowski, Alexander Goldstein, Steven Hemming, Sidney |
author_sort |
Kissel, Catherine |
title |
Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
title_short |
Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
title_full |
Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
title_fullStr |
Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
title_full_unstemmed |
Millennial-scale propagation of Atlantic deep waters to the glacial Southern Ocean |
title_sort |
millennial-scale propagation of atlantic deep waters to the glacial southern ocean |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-03192906 https://hal.science/hal-03192906/document https://hal.science/hal-03192906/file/2008PA001624.pdf https://doi.org/10.1029/2008PA001624 |
genre |
Greenland NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Greenland NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03192906 Paleoceanography, 2008, 23 (2), pp.n/a-n/a. ⟨10.1029/2008PA001624⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008PA001624 hal-03192906 https://hal.science/hal-03192906 https://hal.science/hal-03192906/document https://hal.science/hal-03192906/file/2008PA001624.pdf doi:10.1029/2008PA001624 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008PA001624 |
container_title |
Paleoceanography |
container_volume |
23 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1797583711284232192 |