Peters_et_al_[2012_JGR].pdf (2.64 MB)
Seismic attenuation in glacial ice: a proxy for englacial temperature
journal contribution
posted on 2023-05-18, 13:42 authored by Peters, LE, Anandakrishnan, S, Alley, RB, Voigt, DE[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.
History
Publication title
Journal of Geophysical ResearchVolume
117Issue
F2Pagination
1-10ISSN
0148-0227Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright 2012 American Geophysical UnionRepository Status
- Open