Greenland subglacial lakes detected by radar

Subglacial lakes are an established and important component of the basal hydrological system of the Antarctic ice sheets, but none have been reported from Greenland. Here we present airborne radio echo sounder (RES) measurements that provide the first clear evidence for the existence of subglacial l...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Palmer, Steven J., Dowdeswell, Julian A., Christoffersen, Poul, Young, Duncan A., Blankenship, Donald D., Greenbaum, Jamin S., Benham, Toby, Bamber, Jonathan, Siegert, Martin J.
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
Greenland ice sheet
subglacial lakes
airborne radar
ANTARCTIC ICE-SHEET
STREAMS
Antarc*
Antarctic
Greenland
Ice Sheet
Online Access:https://hdl.handle.net/1983/e208974e-7130-4847-a577-e827168433fe
https://research-information.bris.ac.uk/en/publications/e208974e-7130-4847-a577-e827168433fe
https://doi.org/10.1002/2013GL058383
Description
Summary:Subglacial lakes are an established and important component of the basal hydrological system of the Antarctic ice sheets, but none have been reported from Greenland. Here we present airborne radio echo sounder (RES) measurements that provide the first clear evidence for the existence of subglacial lakes in Greenland. Two lakes, with areas similar to 8 and similar to 10km(2), are found in the northwest sector of the ice sheet, similar to 40km from the ice margin, and below 757 and 809m of ice, respectively. The setting of the Greenland lakes differs from those of Antarctic subglacial lakes, being beneath relatively thin and cold ice, pointing to a fundamental difference in their nature and genesis. Possibilities that the lakes consist of either ancient saline water in a closed system or are part of a fresh, modern open hydrological system are discussed, with the latter interpretation considered more likely.

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