Predicted scattering of sound by diffuse hydrothermal vent plumes at mid-ocean ridges
Predicted scattering of sound by diffuse hydrothermal vent plumes at mid-ocean ridges
复制标题
预测的洋中脊扩散热液喷口羽流对声音的散射
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
D. Trivett
中科院分区：
文献类型：
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作者：
T. Duda;D. Trivett
利用现有理论模拟了传播通过弥漫的大洋中脊热液喷口羽流的单色声信号的幅度和相位波动，试图找到适合羽流监测的频率和路径长度。弱散射的解决方案进行了数值评估，调整模型参数，以匹配观测到的羽流特性。对于500-2000 m的传输范围和20-80 kHz的频率，可以满足弱散射解决方案有效所需的约束条件。因此，由于流体结构和散射强度更紧密地联系在一起，弱散射比强散射，反演流体的统计特性可能是可能的，使扩散喷口监测。这种监测将受到几何假设的影响，例如在统计上均匀的烟羽中完全传播。性能限制相位波动也计算了13-17千赫大地测量系统。
Amplitude and phase fluctuations of monochromatic acoustic signals traveling through diffuse mid-ocean ridge hydrothermal vent plumes are modeled using existing theory in an attempt to find suitable frequencies and path lengths for plume monitoring. Weak-scattering solutions are evaluated numerically, with model parameters adjusted to match observed plume characteristics. Constraints required for weak-scattering solutions to be valid can be met for transmission ranges of 500–2000 m and frequencies of 20–80 kHz. Therefore, because fluid structure and scattering strength are more closely linked for weak scattering than for stronger scattering, inversion for fluid statistical properties may be possible, enabling diffuse vent monitoring. Such monitoring would be subject to geometric assumptions such as transmission entirely within a statistically homogeneous plume. Performance-limiting phase fluctuations have also been computed for a 13–17 kHz geodetic survey system.