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Ice-sheet collapse and sea-level rise at the Bølling warming 14,600 years ago

Author

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  • Pierre Deschamps

    (CEREGE, UMR Aix-Marseille Université – CNRS – IRD – College de France, Technopole de l’Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France)

  • Nicolas Durand

    (CEREGE, UMR Aix-Marseille Université – CNRS – IRD – College de France, Technopole de l’Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France)

  • Edouard Bard

    (CEREGE, UMR Aix-Marseille Université – CNRS – IRD – College de France, Technopole de l’Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France)

  • Bruno Hamelin

    (CEREGE, UMR Aix-Marseille Université – CNRS – IRD – College de France, Technopole de l’Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France)

  • Gilbert Camoin

    (CEREGE, UMR Aix-Marseille Université – CNRS – IRD – College de France, Technopole de l’Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France)

  • Alexander L. Thomas

    (South Parks Road, Oxford OX1 3AN, UK)

  • Gideon M. Henderson

    (South Parks Road, Oxford OX1 3AN, UK)

  • Jun'ichi Okuno

    (University of Tokyo, 5-1-5 Kashiwanoha, Kashiwashi, Chiba 277-8564, Japan
    National Institute of Polar Research)

  • Yusuke Yokoyama

    (University of Tokyo, 5-1-5 Kashiwanoha, Kashiwashi, Chiba 277-8564, Japan
    Institute of Biogeosciences)

Abstract

Past sea-level records provide invaluable information about the response of ice sheets to climate forcing. Some such records suggest that the last deglaciation was punctuated by a dramatic period of sea-level rise, of about 20 metres, in less than 500 years. Controversy about the amplitude and timing of this meltwater pulse (MWP-1A) has, however, led to uncertainty about the source of the melt water and its temporal and causal relationships with the abrupt climate changes of the deglaciation. Here we show that MWP-1A started no earlier than 14,650 years ago and ended before 14,310 years ago, making it coeval with the Bølling warming. Our results, based on corals drilled offshore from Tahiti during Integrated Ocean Drilling Project Expedition 310, reveal that the increase in sea level at Tahiti was between 12 and 22 metres, with a most probable value between 14 and 18 metres, establishing a significant meltwater contribution from the Southern Hemisphere. This implies that the rate of eustatic sea-level rise exceeded 40 millimetres per year during MWP-1A.

Suggested Citation

  • Pierre Deschamps & Nicolas Durand & Edouard Bard & Bruno Hamelin & Gilbert Camoin & Alexander L. Thomas & Gideon M. Henderson & Jun'ichi Okuno & Yusuke Yokoyama, 2012. "Ice-sheet collapse and sea-level rise at the Bølling warming 14,600 years ago," Nature, Nature, vol. 483(7391), pages 559-564, March.
    • Handle: RePEc:nat:nature:v:483:y:2012:i:7391:d:10.1038_nature10902
    DOI: 10.1038/nature10902
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    Cited by:

    1. Yusuke Yokoyama & Kurt Lambeck & Patrick Deckker & Tezer M. Esat & Jody M. Webster & Masao Nakada, 2022. "Towards solving the missing ice problem and the importance of rigorous model data comparisons," Nature Communications, Nature, vol. 13(1), pages 1-4, December.
    2. Tao Li & Laura F. Robinson & Graeme A. MacGilchrist & Tianyu Chen & Joseph A. Stewart & Andrea Burke & Maoyu Wang & Gaojun Li & Jun Chen & James W. B. Rae, 2023. "Enhanced subglacial discharge from Antarctica during meltwater pulse 1A," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Michael E. Weber & Nicholas R. Golledge & Chris J. Fogwill & Chris S. M. Turney & Zoë A. Thomas, 2021. "Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation," Nature Communications, Nature, vol. 12(1), pages 1-13, December.

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