In situ acoustic attenuation measurements in glacial ice
In situ acoustic attenuation measurements in glacial ice
复制标题
冰川中的原位声衰减测量
DOI：
10.1029/jz070i008p01849
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发表时间：
1965
影响因子：
--
通讯作者：
J. Westphal
中科院分区：
文献类型：
--
作者：
J. Westphal
在温带山谷冰川的冰的衰减系数测量的压力脉冲，直接通过冰从一个小的爆炸传输的频谱分析。数值从2.5 kc/s时的0.014±.002/m变化到15 kc/s时的0.215±.002/m。衰减函数严格遵循形式α = A + Bf ^[4]，这表明瑞利散射是冰川冰中高频声波衰减的主要来源。从冰晶边界的散射是兼容的所观察到的散射系数。
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.