In situ acoustic attenuation measurements in glacial ice
The attenuation coefficient of ice in a temperate valley glacier was measured by spectral analysis of the pressure pulse, directly transmitted through the ice from a small explosion. Values varied from 0.014±.002/m at 2.5 kc/s to 0.215±.002/m at 15 kc/s. The attenuation function follows a form α = A + Bƒ^4 closely, suggesting Rayleigh-type scattering as the dominant source of attenuation of high-frequency acoustic waves in glacial ice. Scattering from ice crystal boundaries is compatible with the observed scattering coefficient.
Additional InformationCopyright 1965 by the American Geophysical Union. (Manuscript received November 28, 1964; revised January 20, 1965.) I would like to thank Drs. H. Dix, B. Murray, and D. Anderson for valuable discussions and Dr. C. Allen for help with part of the field work. This research was supported by NSF grant GP-745. Contribution 1293.
Published - jgr4542.pdf