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[1] Seismic attenuation α, or internal friction Q⁻¹, in glacial ice is highly sensitive to temperature, particularly near the melting point. Here we detail a technique to estimate Q and apply it to active source seismic data from Jakobshavn Isbrae, Greenland. We compare our results to measured and modeled temperature profiles of the ice in the region. We find an excellent match, with differences between seismically estimated and modeled temperatures of less than 2°C. Mapping variations in seismic Q through glacial ice thus is shown to allow detailed estimation of englacial temperature profiles, which may be of special value in regions where in situ measurements are logistically difficult.

Item Type:	Refereed Article
Keywords:	englacial temperature, seismology
Research Division:	Earth Sciences
Research Group:	Physical geography and environmental geoscience
Research Field:	Glaciology
Objective Division:	Environmental Policy, Climate Change and Natural Hazards
Objective Group:	Understanding climate change
Objective Field:	Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:	Peters, LE (Dr Leo Peters)
ID Code:	103757
Year Published:	2012
Web of Science® Times Cited:	53
Deposited By:	IMAS Research and Education Centre
Deposited On:	2015-10-27
Last Modified:	2017-10-30
Downloads:	240 View Download Statistics