• Catalogue PIGMA
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Sedimentological and geochemical records of the North Atlantic Glacial Eastern Boundary Current, 50-15 ka BP

The upper branch of the Atlantic Meridional Overturning Circulation (AMOC) plays a critical role in ocean circulation and climate change, yet its variability during the last glacial period is poorly documented. Here, we investigate the northward-flowing Glacial Eastern Boundary Current (GEBC) in the North Atlantic, known today as the European Slope Current, and representing the easternmost portion of the upper branch of the AMOC. Based on flow speed (sortable silt, XRF) and radiogenic/stable isotopic records, we show that Dansgaard-Oeschger (D/O) interstadials (stadials) correspond to a faster (weaker) GEBC during the ~50-15 ka period. This, by analogy to present-day conditions, suggests enhanced (reduced) strength of the subpolar gyre and, by extension, of northern-sourced water production and AMOC during D-O interstadials (stadials). Concomitant fluctuations of both the European Ice Sheet and the GEBC between ~30 and 17 ka suggest an active role of the upper branch of AMOC in the poleward transport of heat and freshwater to the northern North Atlantic, with direct impacts on deep water formation and AMOC strength. Our GEBC reconstruction is the first physical (non-chemical) record documenting dynamic upper AMOC variability at high resolution in the eastern basin of the North Atlantic. Together with the deep North Atlantic records of northern-sourced water export, they confirm the central role of the AMOC in the generation of abrupt climate changes.

Simple

Date (Publication)
2020-12
Date (Revision)
2021-05-12
Other citation details

Toucanne Samuel, Soulet Guillaume, Vazquez Riveiros Natalia, Boswell Steven, Dennielou Bernard, Waelbroeck Claire, Bayon Germain, Mojtahid Meryem, Bosq Mathieu, Sabine Marjolaine, Zaragosi Sébastien, Bourillet Jean-Francois, Mercier Herle (2020). Sedimentological and geochemical records of the North Atlantic Glacial Eastern Boundary Current, 50-15 ka BP. SEANOE. https://doi.org/10.17882/77667

In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :

Toucanne Samuel, Soulet Guillaume, Vazquez Riveiros Natalia, Boswell Steven M., Dennielou Bernard, Waelbroeck Claire, Bayon Germain, Mojtahid Meryem, Bosq Mathieu, Sabine Marjolaine, Zaragosi Sébastien, Bourillet Jean-Francois, Mercier Herle (2021). The North Atlantic Glacial Eastern Boundary Current as a key driver for ice‐sheet – AMOC interactions and climate instability. Paleoceanography And Paleoclimatology, 36(3), e2020PA004068 (23p.). https://doi.org/10.1029/2020PA004068

Credit
The production of this dataset and associated publication was sponsored by the French National Research Agency (ANR) via the LabexMER program (ANR-10-LABX-19-01) and the TANDEM project (ANR-11-RSNR-00023-01). The authors warmly acknowledge the crew of oceanographic cruises ALIENOR 2 (https://doi.org/10.17600/4200200), BOBGEO (https://doi.org/10.17600/9030060), CABTEX (https://doi.org/10.17600/10030050), GITAN (https://doi.org/10.17600/15017800), IMAGES1 (https://doi.org/10.17600/95200110), IMAGESV-MD114 (https://doi.org/10.17600/99200070).
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - TOUCANNE Samuel
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - SOULET Guillaume
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - VAZQUEZ RIVEIROS Natalia
Author
  Columbia University, Lamont-Doherty Earth Observatory, Palisades, New York 10964, United States - BOSWELL Steven
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - DENNIELOU Bernard
Author
  CNRS, Laboratoire d’Océanographie et du Climat : Expérimentation et Approches Numériques, LOCEAN/IPSL, Sorbonne Université-CNRS-IRD-MNHN, UMR7159, Paris, France - WAELBROECK Claire
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - BAYON Germain
Author
  Université d’Angers, LPG-BIAF UMR-CNRS 6112, UFR Sciences, 2 bd Lavoisier 49045, Angers Cedex 01, France - MOJTAHID Meryem
Author
  Université Bordeaux, PACEA, UMR 5199 CNRS - Bâtiment B8, allée Geoffroy Saint Hilaire, 33615 Pessac, France - BOSQ Mathieu
Author
  Université Bordeaux, UMR-CNRS 5805 EPOC - OASU, CS50023, 33615 Pessac, France - SABINE Marjolaine
Author
  Université Bordeaux, UMR-CNRS 5805 EPOC - OASU, CS50023, 33615 Pessac, France - ZARAGOSI Sébastien
Author
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - BOURILLET Jean-Francois
Author
  CNRS, IFREMER, Université de Brest, IRD, Laboratoire d’Océanographie Physique et Spatiale (LOPS), Centre IFREMER de Bretagne, CS10070, F-29280, Plouzané, France - MERCIER Herle
Publisher
  SEANOE
Theme
  • AMOC
  • last glacial period
  • Dansgaard-Oeschger
  • paleoclimate
  • paleoceanography
  • eastern boundary current
  • European Slope Current
  • contourites
  • Cross-discipline
ODATIS aggregation parameters and Essential Variable names
  • Currents
  • Sea ice
SeaDataNet Parameter Disciplines
  • Cross-discipline
Centre de données ODATIS
  • CDS-OASU
Type de jeux de donnée ODATIS
  • /Observational data/in-situ
Use limitation
CC-BY (Creative Commons - Attribution)
Use constraints
Other restrictions
Date (Publication)
2021
Publisher
  American Geophysical Union (AGU)
Author
  TOUCANNE SAMUEL
Author
  SOULET GUILLAUME
Author
  VAZQUEZ RIVEIROS NATALIA
Author
  BOSWELL STEVEN M.
Author
  DENNIELOU BERNARD
Author
  WAELBROECK CLAIRE
Author
  BAYON GERMAIN
Author
  MOJTAHID MERYEM
Author
  BOSQ MATHIEU
Author
  SABINE MARJOLAINE
Author
  ZARAGOSI SÉBASTIEN
Author
  BOURILLET JEAN-FRANCOIS
Author
  MERCIER HERLE
Unique resource identifier
10.1029/2020PA004068
Association Type
Cross reference
Initiative Type
Study
Unique resource identifier
10.17600/9030060
Association Type
Cross reference
Initiative Type
Platform
Unique resource identifier
10.17600/10030050
Association Type
Cross reference
Initiative Type
Platform
Unique resource identifier
10.17600/15017800
Association Type
Cross reference
Initiative Type
Platform
Unique resource identifier
10.17600/95200110
Association Type
Cross reference
Initiative Type
Platform
Unique resource identifier
10.17600/99200070
Association Type
Cross reference
Initiative Type
Platform
Unique resource identifier
10.17600/4200200
Association Type
Cross reference
Initiative Type
Platform
Metadata language
English
Topic category
  • Oceans
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W
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Begin date
2021
Distribution format
  • XLS, XLSX ( )

OnLine resource
Processed data ( WWW:DOWNLOAD-1.0-link--download )

Radiogenic neodymium isotopic composition (planktic foraminifera), French Atlantic margin - 17 KB

OnLine resource
Processed data ( WWW:DOWNLOAD-1.0-link--download )

Stable Carbon/Oxygen isotopic composition (benthic foraminifera), French Atlantic margin - 44 KB

OnLine resource
Processed data ( WWW:DOWNLOAD-1.0-link--download )

Sortable silt and XRF log (Zr/Rb), French Atlantic margin - 262 KB

OnLine resource
DOI of the product ( WWW:LINK-1.0-http--metadata-URL )
OnLine resource
Seanoe ( rel-canonical )
Hierarchy level
Dataset
File identifier
seanoe:77667 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2021-05-12
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
  IFREMER, Unité de Recherche Géosciences Marines, Laboratoire Géophysique et enregistrement Sédimentaire, CS10070, F-29280 Plouzané, France - TOUCANNE Samuel
 
 

Overviews

overview
The North Atlantic Glacial Eastern Boundary Current (GEBC), with maximum strength during the Dansgaard-Oeschger interstadials

Spatial extent

N
S
E
W
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Keywords

AMOC Cross-discipline Dansgaard-Oeschger European Slope Current contourites eastern boundary current last glacial period paleoceanography paleoclimate
Centre de données ODATIS
CDS-OASU
ODATIS aggregation parameters and Essential Variable names
Currents Sea ice
Type de jeux de donnée ODATIS
/Observational data/in-situ

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