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Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer

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  • Martin Werner

    (Helmholtz Centre for Polar and Marine Sciences)

  • Jean Jouzel

    (Université Paris Saclay)

  • Valérie Masson-Delmotte

    (Université Paris Saclay)

  • Gerrit Lohmann

    (Helmholtz Centre for Polar and Marine Sciences)

Abstract

Stable water isotope records from Antarctica are key for our understanding of Quaternary climate variations. However, the exact quantitative interpretation of these important climate proxy records in terms of surface temperature, ice sheet height and other climatic changes is still a matter of debate. Here we report results obtained with an atmospheric general circulation model equipped with water isotopes, run at a high-spatial horizontal resolution of one-by-one degree. Comparing different glacial maximum ice sheet reconstructions, a best model data match is achieved for the PMIP3 reconstruction. Reduced West Antarctic elevation changes between 400 and 800 m lead to further improved agreement with ice core data. Our modern and glacial climate simulations support the validity of the isotopic paleothermometer approach based on the use of present-day observations and reveal that a glacial ocean state as displayed in the GLAMAP reconstruction is suitable for capturing the observed glacial isotope changes in Antarctic ice cores.

Suggested Citation

  • Martin Werner & Jean Jouzel & Valérie Masson-Delmotte & Gerrit Lohmann, 2018. "Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05430-y
    DOI: 10.1038/s41467-018-05430-y
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    Cited by:

    1. 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.
    2. Ilaria Crotti & Aurélien Quiquet & Amaelle Landais & Barbara Stenni & David J. Wilson & Mirko Severi & Robert Mulvaney & Frank Wilhelms & Carlo Barbante & Massimo Frezzotti, 2022. "Wilkes subglacial basin ice sheet response to Southern Ocean warming during late Pleistocene interglacials," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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