High Geothermal Heat Flow, Basal Melt, and the Origin of Rapid Ice Flow in Central Greenland

Age-depth relations from internal layering reveal a large region of rapid basal melting in Greenland. Melt is localized at the onset of rapid ice flow in the large ice stream that drains north off the summit dome and other areas in the northeast quadrant of the ice sheet. Locally, high melt rates in...

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Bibliographic Details
Published in:Science
Main Authors: Fahnestock, Mark, Abdalati, Waleed, Joughin, Ian, Brozena, John, Gogineni, Prasad
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2001
Subjects:
Greenland
Ice Sheet
Online Access:http://dx.doi.org/10.1126/science.1065370
https://www.science.org/doi/pdf/10.1126/science.1065370
Description
Summary:Age-depth relations from internal layering reveal a large region of rapid basal melting in Greenland. Melt is localized at the onset of rapid ice flow in the large ice stream that drains north off the summit dome and other areas in the northeast quadrant of the ice sheet. Locally, high melt rates indicate geothermal fluxes 15 to 30 times continental background. The southern limit of melt coincides with magnetic anomalies and topography that suggest a volcanic origin.

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