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Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial

Author

Listed:
  • Mutsumi Iizuka

    (Hokkaido University
    Hokkaido University
    The National Institute of Advanced Industrial Science and Technology (AIST))

  • Osamu Seki

    (Hokkaido University
    Hokkaido University)

  • David J. Wilson

    (University College London and Birkbeck, University of London)

  • Yusuke Suganuma

    (National Institute of Polar Research
    The Graduate University for Advanced Studies (SOKENDAI))

  • Keiji Horikawa

    (University of Toyama)

  • Tina Flierdt

    (Imperial College London)

  • Minoru Ikehara

    (Kochi University)

  • Takuya Itaki

    (The National Institute of Advanced Industrial Science and Technology (AIST))

  • Tomohisa Irino

    (Hokkaido University
    Hokkaido University)

  • Masanobu Yamamoto

    (Hokkaido University
    Hokkaido University)

  • Motohiro Hirabayashi

    (National Institute of Polar Research)

  • Hiroyuki Matsuzaki

    (The University of Tokyo)

  • Saiko Sugisaki

    (The National Institute of Advanced Industrial Science and Technology (AIST))

Abstract

The Last Interglacial (LIG: 130,000–115,000 years ago) was a period of warmer global mean temperatures and higher and more variable sea levels than the Holocene (11,700–0 years ago). Therefore, a better understanding of Antarctic ice-sheet dynamics during this interval would provide valuable insights for projecting sea-level change in future warming scenarios. Here we present a high-resolution record constraining ice-sheet changes in the Wilkes Subglacial Basin (WSB) of East Antarctica during the LIG, based on analysis of sediment provenance and an ice melt proxy in a marine sediment core retrieved from the Wilkes Land margin. Our sedimentary records, together with existing ice-core records, reveal dynamic fluctuations of the ice sheet in the WSB, with thinning, melting, and potentially retreat leading to ice loss during both early and late stages of the LIG. We suggest that such changes along the East Antarctic Ice Sheet margin may have contributed to fluctuating global sea levels during the LIG.

Suggested Citation

  • Mutsumi Iizuka & Osamu Seki & David J. Wilson & Yusuke Suganuma & Keiji Horikawa & Tina Flierdt & Minoru Ikehara & Takuya Itaki & Tomohisa Irino & Masanobu Yamamoto & Motohiro Hirabayashi & Hiroyuki M, 2023. "Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37325-y
    DOI: 10.1038/s41467-023-37325-y
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