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Area of Science:

  • Solid Earth physics
  • Glaciology
  • Antarctic climate science

Background:

  • Geodetic studies reveal solid-Earth uplift stabilizes polar ice sheets.
  • The impact of short-wavelength uplift near grounding lines remains unassessed.

Purpose of the Study:

  • To simulate Antarctic ice sheet evolution considering solid-Earth processes.
  • To assess the influence of short-term solid-Earth uplift on grounding line migration.

Main Methods:

  • Developed a high-resolution global simulation of Antarctic ice sheet evolution.
  • Incorporated all relevant solid-Earth processes affecting ice sheets.

Main Results:

  • Projected a 38% negative feedback in grounding line migration for Thwaites Glacier.
  • This feedback corresponds to a 26.8% reduction in sea-level contribution.

Conclusions:

  • Short-wavelength solid-Earth uplift significantly impacts grounding line stability.
  • This mechanism offers a crucial stabilizing feedback for Antarctic ice sheets.