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Antarctic ice-shelf advance driven by anomalous atmospheric and sea-ice circulation

Nature Geoscience, ISSN: 1752-0908, Vol: 15, Issue: 5, Page: 356-362
2022
  • 42
    Citations
  • 0
    Usage
  • 83
    Captures
  • 27
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    42
    • Citation Indexes
      41
    • Policy Citations
      1
      • 1
  • Captures
    83
  • Mentions
    27
    • News Mentions
      24
      • 24
    • Blog Mentions
      3
      • 3

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Article Description

The disintegration of the eastern Antarctic Peninsula’s Larsen A and B ice shelves has been attributed to atmosphere and ocean warming, and increased mass losses from the glaciers once restrained by these ice shelves have increased Antarctica’s total contribution to sea-level rise. Abrupt recessions in ice-shelf frontal position presaged the break-up of Larsen A and B, yet, in the ~20 years since these events, documented knowledge of frontal change along the entire ~1,400-km-long eastern Antarctic Peninsula is limited. Here, we show that 85% of the seaward ice-shelf perimeter fringing this coastline underwent uninterrupted advance between the early 2000s and 2019, in contrast to the two previous decades. We attribute this advance to enhanced ocean-wave dampening, ice-shelf buttressing and the absence of sea-surface slope-induced gravitational ice-shelf flow. These phenomena were, in turn, enabled by increased near-shore sea ice driven by a Weddell Sea-wide intensification of cyclonic surface winds around 2002. Collectively, our observations demonstrate that sea-ice change can either safeguard from, or set in motion, the final rifting and calving of even large Antarctic ice shelves.

Bibliographic Details

Frazer D. W. Christie; Toby J. Benham; Christine L. Batchelor; Wolfgang Rack; Aleksandr Montelli; Julian A. Dowdeswell

Springer Science and Business Media LLC

Earth and Planetary Sciences

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