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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
<mark>Journal publication date</mark>29/10/2019
Issue number10
Number of pages8
Pages (from-to)2789-2796
Publication StatusPublished
<mark>Original language</mark>English


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.

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Export Date: 13 November 2019