TY - JOUR
T1 - Seismic attenuation in glacial ice
T2 - A proxy for englacial temperature
AU - Peters, L. E.
AU - Anandakrishnan, S.
AU - Alley, R. B.
AU - Voigt, D. E.
PY - 2012/6/1
Y1 - 2012/6/1
N2 - Seismic attenuation , 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 2C. 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.
AB - Seismic attenuation , 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 2C. 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.
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U2 - 10.1029/2011JF002201
DO - 10.1029/2011JF002201
M3 - Article
AN - SCOPUS:84859915612
SN - 2169-9003
VL - 117
JO - Journal of Geophysical Research: Earth Surface
JF - Journal of Geophysical Research: Earth Surface
IS - 2
M1 - F02008
ER -