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Wind causes Totten Ice Shelf melt and acceleration.

Chad A Greene1,2, Donald D Blankenship1,2, David E Gwyther3

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Science Advances
|November 8, 2017
PubMed
Summary

Totten Glacier

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Area of Science:

  • Glaciology
  • Oceanography
  • Climate Science

Background:

  • Totten Glacier in East Antarctica holds significant potential for global sea-level rise.
  • Its ice shelf's variability in speed, thickness, and grounding line position requires understanding climate change impacts.

Purpose of the Study:

  • To investigate the drivers of interannual variability in the Totten Ice Shelf.
  • To understand the sensitivity of Totten Glacier to climate forcing.

Main Methods:

  • Comparison of ice velocity data with oceanic wind stress.
  • Analysis of upwelling anomalies at the continental shelf break.

Main Results:

  • A consistent pattern of ice-shelf acceleration was observed 19 months after upwelling anomalies.
  • Ice-shelf response to climate forcing is driven by wind-induced oceanic heat redistribution.
  • This sensitivity is independent of large-scale atmospheric or oceanic warming.

Conclusions:

  • The stability of Totten Glacier is linked to coastal upwelling dynamics.
  • Projected intensification of East Antarctic surface winds may impact glacier stability.