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

Livingstone, S.J. and Sole, A.J. and Storrar, R.D. and Harrison, D. and Ross, N. and Bowling, J. (2019) Brief communication:Subglacial lake drainage beneath Isunguata Sermia, West Greenland: Geomorphic and ice dynamic effects. Cryosphere, 13 (10). pp. 2789-2796. ISSN 1994-0416

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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.

Item Type:
Journal Article
Journal or Publication Title:
Cryosphere
Additional Information:
Export Date: 13 November 2019
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1904
Subjects:
ID Code:
138952
Deposited By:
Deposited On:
14 Nov 2019 09:15
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Dec 2020 07:38