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Interhemispheric Atlantic seesaw response during the last deglaciation

Author

Listed:
  • Stephen Barker

    (School of Earth and Ocean Sciences, Cardiff University)

  • Paula Diz

    (School of Earth and Ocean Sciences, Cardiff University
    Present addresses: Laboratoire des Bio-Indicateurs Actuels et Fossiles, Angers University, 49045 Angers Cedex 01, France (P.D.); Alfred Wegener Institute, 27570 Bremerhaven, Germany (G.K.).)

  • Maryline J. Vautravers

    (British Antarctic Survey)

  • Jennifer Pike

    (School of Earth and Ocean Sciences, Cardiff University)

  • Gregor Knorr

    (School of Earth and Ocean Sciences, Cardiff University
    Present addresses: Laboratoire des Bio-Indicateurs Actuels et Fossiles, Angers University, 49045 Angers Cedex 01, France (P.D.); Alfred Wegener Institute, 27570 Bremerhaven, Germany (G.K.).)

  • Ian R. Hall

    (School of Earth and Ocean Sciences, Cardiff University)

  • Wallace S. Broecker

    (Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964-8000, USA)

Abstract

The asynchronous relationship between millennial-scale temperature changes over Greenland and Antarctica during the last glacial period has led to the notion of a bipolar seesaw which acts to redistribute heat depending on the state of meridional overturning circulation within the Atlantic Ocean. Here we present new records from the South Atlantic that show rapid changes during the last deglaciation that were instantaneous (within dating uncertainty) and of opposite sign to those observed in the North Atlantic. Our results demonstrate a direct link between the abrupt changes associated with variations in the Atlantic meridional overturning circulation and the more gradual adjustments characteristic of the Southern Ocean. These results emphasize the importance of the Southern Ocean for the development and transmission of millennial-scale climate variability and highlight its role in deglacial climate change and the associated rise in atmospheric carbon dioxide.

Suggested Citation

  • Stephen Barker & Paula Diz & Maryline J. Vautravers & Jennifer Pike & Gregor Knorr & Ian R. Hall & Wallace S. Broecker, 2009. "Interhemispheric Atlantic seesaw response during the last deglaciation," Nature, Nature, vol. 457(7233), pages 1097-1102, February.
    • Handle: RePEc:nat:nature:v:457:y:2009:i:7233:d:10.1038_nature07770
    DOI: 10.1038/nature07770
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    Cited by:

    1. Gagan Mandal & Jia-Yuh Yu & Shih-Yu Lee, 2022. "The Roles of Orbital and Meltwater Climate Forcings on the Southern Ocean Dynamics during the Last Deglaciation," Sustainability, MDPI, vol. 14(5), pages 1-17, March.
    2. Iestyn D. Barr & Matteo Spagnolo & Brice R. Rea & Robert G. Bingham & Rachel P. Oien & Kathryn Adamson & Jeremy C. Ely & Donal J. Mullan & Ramón Pellitero & Matt D. Tomkins, 2022. "60 million years of glaciation in the Transantarctic Mountains," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Xueyuan Kuang & Frederik Schenk & Rienk Smittenberg & Petter Hällberg & Qiong Zhang, 2021. "Seasonal evolution differences of east Asian summer monsoon precipitation between Bølling-Allerød and younger Dryas periods," Climatic Change, Springer, vol. 165(1), pages 1-18, March.
    4. Xiyu Dong & Gayatri Kathayat & Sune O. Rasmussen & Anders Svensson & Jeffrey P. Severinghaus & Hanying Li & Ashish Sinha & Yao Xu & Haiwei Zhang & Zhengguo Shi & Yanjun Cai & Carlos Pérez-Mejías & Jon, 2022. "Coupled atmosphere-ice-ocean dynamics during Heinrich Stadial 2," Nature Communications, Nature, vol. 13(1), pages 1-14, December.

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