Switch-off of a major enhanced ice flow unit in East Antarctica

David M. Rippin, Martin J. Siegert, Jonathan L. Bamber, David G. Vaughan, Hugh F. J. Corr

Research output: Contribution to journalArticlepeer-review

Abstract

The East Antarctic Ice Sheet (EAIS) is the largest reservoir of ice on the planet by an order of magnitude. Compared with the West Antarctic Ice Sheet (WAIS), it is traditionally considered to be relatively stable, with only minor adjustments to its configuration over glacial-interglacial cycles. Here, we present the results of a radioecho sounding survey from Coats Land, East Antarctica, which suggests that parts of the EAIS outlet drainage system may have changed significantly since the Last Glacial Maximum. We have identified an enhanced flow unit from buckled internal layering and smooth bed morphology that is no longer active. We believe this feature to have shut down at some point since the Last Glacial Maximum, similar to 20 ka BP.

Original languageEnglish
Pages (from-to)-
Number of pages6
JournalGeophysical Research Letters
Volume33
Issue number15
DOIs
Publication statusPublished - 10 Aug 2006

Keywords

  • WEST ANTARCTICA
  • GLACIAL CYCLES
  • DOME-C
  • STREAM
  • SHEET
  • TRIBUTARIES
  • INTERFEROMETRY
  • REGION
  • BASAL

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