海洋冷泉区常含有巨大资源前景和引发环境灾害的天然气水合物, 并发育有依赖于流体化学自养能和养分的特异生物群, 研究其泄漏气体的流量和流速, 具有重要的资源和环境意义。冷泉区存在大量气泡幕, 首先根据声波穿过气泡幕时会产生强烈衰减的特征, 对穿过不同气泡流量的声波进行探测, 得到气泡流量和声波衰减呈线性比例关系; 其次, 利用相关流量法对放置于不同深度的两路接收信号进行互相关分析, 计算出气泡流的上升速度。在此基础上通过声学探测所得声波幅值, 反演出气泡流量; 并由气泡的上升速度和流量得出气泡的分布范围, 为海洋冷泉区气泡流速流量探测提供了新的方法。
There are great quantities of natural gas hydrate beneath seawater, which are giant resources potentially and capable of damaging environment; and special species is also discovered in related area. So, the detection and quantification of an underwater gas release are becoming increasingly important for oceanographic and industrial applications. According to the characters of acoustic attenuation when acoustic wave propagates through bubbles, detection of different flow rate of bubbles was conducted, and result of the relation of bubbles flow rate and acoustic attenuation was presented. In addition, the rising velocity of bubbles was estimated using the relate flow method of two signals received at different depths. Then, the flux of bubbles was inversed by acoustic signal, and the bubble distribution was calculated by the rising velocity and flux, which provided a new method for detection and quantification of undersea bubbles.
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