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Brief communication: Subglacial lake drainage beneath Isunguata Sermia, West Greenland: Geomorphic and ice dynamic effects

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  • S.J. Livingstone
  • A.J. Sole
  • R.D. Storrar
  • D. Harrison
  • N. Ross
  • J. Bowling
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<mark>Journal publication date</mark>29/10/2019
<mark>Journal</mark>Cryosphere
Issue number10
Volume13
Number of pages8
Pages (from-to)2789-2796
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We report three active subglacial lakes within 2 km of the lateral margin of Isunguata Sermia, West Greenland, identified by differencing time-stamped ArcticDEM strips. Each lake underwent one drainage–refill event between 2009 and 2017, with two lakes draining in < 1 month in August 2014 and August 2015. The 2015 drainage caused a ∼ 1-month down-glacier slowdown in ice flow and flooded the foreland, aggrading the proglacial channel by 8 m. The proglacial flooding confirms the ice-surface elevation anomalies as subglacial water bodies and demonstrates how their drainage can significantly modify proglacial environments. These subglacial lakes offer accessible targets for geophysical investigations and exploration.

Bibliographic note

Export Date: 13 November 2019