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

Autor: S. J. Livingstone, A. J. Sole, R. D. Storrar, D. Harrison, N. Ross, J. Bowling
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: The Cryosphere, Vol 13, Pp 2789-2796 (2019)
Druh dokumentu: article
ISSN: 1994-0416
1994-0424
DOI: 10.5194/tc-13-2789-2019
Popis: 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.
Databáze: Directory of Open Access Journals
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