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Multi-year mosaics of Antarctic ice motion from satellite radar interferometry: 1995 to 2022
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  • Eric Rignot,
  • Jeremie Mouginot,
  • Bernd Scheuchl,
  • Seongsu Jeong
Eric Rignot
University of California, Irvine

Corresponding Author:[email protected]

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Jeremie Mouginot
Université Grenoble Alpes, CNRS
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Bernd Scheuchl
University of California, Irvine
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Seongsu Jeong
University of California, Irvine
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Abstract

Ice motion and ice boundary are critical information for ice sheet models that project ice evolution in a warming climate. We present four historical, continent-wide, maps of Antarctic ice motion and boundary for the time period 1995-2022. The results reveal no change in 2/3rd of the interior regions, block rotation and rift propagation at ice shelf fronts, and widespread glacier speedup that propagates from 10 to 100 km’s inland. Speedup affects the entire drainage of the Amundsen Sea Embayment sector, in West Antarctica; the entire west coast of the Antarctic Peninsula down to GeorgeVI Ice Shelf; the east coast down to Larsen C Ice Shelf; Getz Ice Shelf, Hull and Land glaciers in West Antarctica; Matusevitch, Ninnis, Mertz and Denman glaciers, glaciers in Porpoise and Vincennes Bay, and Robert, Wilma and Rayner glaciers in Enderby Land, in East Antarctica. We attribute the changes to faster melting by warmer ocean waters.