In situ acoustic attenuation measurements in glacial ice
作者： James A. Westphal
关键词: Geology 、 Scattering 、 Acoustic attenuation 、 Attenuation 、 Acoustic wave 、 Glacier 、 Attenuation coefficient 、 Glacier morphology 、 Mineralogy 、 Optics 、 Ice crystals 、 Earth-Surface Processes 、 Ecology (disciplines) 、 Earth and Planetary Sciences (miscellaneous) 、 Space and Planetary Science 、 Palaeontology 、 Forestry 、 Aquatic science 、 Atmospheric Science 、 Soil science 、 Geochemistry and Petrology 、 Geophysics 、 Oceanography 、 Water Science and Technology
摘要: The attenuation coefficient of ice in a temperate valley glacier was measured by spectral analysis the pressure pulse, directly transmitted through from small explosion. Values varied 0.014±.002/m at 2.5 kc/s to 0.215±.002/m 15 kc/s. function follows form α = A + Bƒ^4 closely, suggesting Rayleigh-type scattering as dominant source high-frequency acoustic waves glacial ice. Scattering crystal boundaries is compatible with observed coefficient.
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