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Surface Meltwater Impounded by Seasonal Englacial Storage in West Greenland

Kendrick, AK; Schroeder, DM; Chu, W; Young, TJ; Christoffesen, P; Todd, J; Doyle, SH; ... Lok, LB; + view all (2018) Surface Meltwater Impounded by Seasonal Englacial Storage in West Greenland. Geophysical Research Letters , 45 (19) 10,474-10,481. 10.1029/2018GL079787. Green open access

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Abstract

The delivery of surface meltwater through englacial drainage systems to the bed of the Greenland Ice Sheet modulates ice flow through basal lubrication. Recent studies in Southeast Greenland have identified a perennial firn aquifer; however, there are few observations quantifying the input or residence time of water within the englacial system and it remains unknown whether water can be stored within solid ice. Using hourly stationary radar measurements, we present observations of englacial and episodic subglacial water in the ablation zone of Store Glacier in West Greenland. We find significant storage of meltwater in solid ice damaged by crevasses extending down to 48 m below the ice surface during the summer which is released or refrozen during winter. This is a significant hydrological component newly observed in the ablation zone of Greenland that could delay the delivery of meltwater to the bed, changing the ice dynamic response to surface meltwater.

Type: Article
Title: Surface Meltwater Impounded by Seasonal Englacial Storage in West Greenland
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2018GL079787
Publisher version: https://doi.org/10.1029/2018GL079787
Language: English
Additional information: ©2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: glacial hydrology, radio glaciology, englacial storage, subglacial drainage, Greenland Ice Sheet
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10056984
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