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No general stability conditions for marine ice-sheet grounding lines in the presence of feedbacks

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  • Olga V. Sergienko

    (Princeton University)

Abstract

The “marine ice-sheet instability” hypothesis continues to be used to interpret the observed mass loss from the Antarctic and Greenland ice sheets. This hypothesis has been developed for conditions that do not account for feedbacks between ice sheets and environmental conditions. However, snow accumulation and the ice-sheet surface melting depend on the surface temperature, which is a strong function of elevation. Consequently, there is a feedback between precipitation, atmospheric surface temperature and ice-sheet surface elevation. Here, we investigate stability conditions of a marine-based ice sheet in the presence of such a feedback. Our results show that no general stability condition similar to one associated with the “marine ice-sheet instability” hypothesis can be determined. Stability of individual configurations can be established only on a case-by-case basis. These results apply to a wide range of feedbacks between marine ice sheets and atmosphere, ocean and lithosphere.

Suggested Citation

  • Olga V. Sergienko, 2022. "No general stability conditions for marine ice-sheet grounding lines in the presence of feedbacks," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29892-3
    DOI: 10.1038/s41467-022-29892-3
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    References listed on IDEAS

    as
    1. Shfaqat A. Khan & Anders A. Bjørk & Jonathan L. Bamber & Mathieu Morlighem & Michael Bevis & Kurt H. Kjær & Jérémie Mouginot & Anja Løkkegaard & David M. Holland & Andy Aschwanden & Bao Zhang & Veit H, 2020. "Centennial response of Greenland’s three largest outlet glaciers," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    2. Andrew Shepherd & Helen Amanda Fricker & Sinead Louise Farrell, 2018. "Trends and connections across the Antarctic cryosphere," Nature, Nature, vol. 558(7709), pages 223-232, June.
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