Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles.
Preliminary mapping of void fractions and sound speeds in gassy marine sediments from subbottom profiles.
复制标题
海底剖面气态海洋沉积物中空隙率和声速的初步测绘。
DOI：
10.1121/1.2993744
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
G. Robb
中科院分区：
文献类型：
--
作者：
T. Leighton;G. Robb
海洋沉积物中的气泡（通常是甲烷）影响海床的承载特性，并充当“温室”气体的天然储存库。本文描述了一种简单的方法，可以应用于历史和未来的海底剖面，以推断气泡孔隙分数，绘制气态沉积物的垂直和水平分布，以及相关的声速扰动，甚至单频失谐。它通过识别地质中的水平特征，并将任何感知到的深度变化解释为气泡介导的声速变化。
Bubbles of gas (usually methane) in marine sediments affect the load-bearing properties of the seabed and act as a natural reservoir of "greenhouse" gas. This paper describes a simple method which can be applied to historical and future subbottom profiles to infer bubble void fractions and map the vertical and horizontal distributions of gassy sediments, and the associated sound speed perturbations, even with single-frequency insonification. It operates by identifying horizontal features in the geology and interpreting any perceived change of depth in these as a bubble-mediated change in sound speed.