Observing Internal Solitary Waves in the Lombok Strait by Coastal Acoustic Tomography
Observing Internal Solitary Waves in the Lombok Strait by Coastal Acoustic Tomography
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通过沿海声学层析成像观测龙目海峡的内孤立波
DOI：
10.1029/2019gl084595
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发表时间：
2019-09-01
影响因子：
5.2
通讯作者：
Kaneko, Arata
中科院分区：
文献类型：
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作者：
Syamsudin, Fadli;Taniguchi, Naokazu;Kaneko, Arata
2019年2月27日至29日，在印度尼西亚龙目海峡，通过两个底部系泊的海岸声学层析成像系统，在18.286 km的路径长度上观测了内孤立波的地下结构。对于前三个到达峰值，确定了沿声学站之间的传输路径的单程传播时间沿着。由此产生的三个旅行时间被用来执行四层（0-50，150-300，300-450，和400-603米）的温度反演，构建一个欠定问题。反演的四层温度在观测期间显示出三个正峰值和两个负峰值，这意味着内孤立波与凹陷和升高的界面顺序通过。这些温度峰的产生与日潮汐同步，峰高随深度减小。反演的四层温度与声波站附近获得的电导率-温度-深度数据非常吻合。
The subsurface structures of internal solitary waves were observed over two days from 27 to 29 February 2019, by two bottom-moored coastal acoustic tomography systems over a path length of 18.286 km in the Lombok Strait, Indonesia. One-way travel times along the transmission path between the acoustic stations were determined for the first three arrival peaks. The resulting three travel times were used to execute a four-layer (0-50, 150-300, 300-450, and 400-603 m) temperature inversion, constructing an underdetermined problem. The inverted four-layer temperatures show three positive peaks and two negative peaks during the observation period, implying the sequential passage of internal solitary waves with depressed and elevated interfaces. The generation of these temperature peaks is synchronized with the diurnal tides, and the peak heights decrease with depth. The inverted four-layer temperatures are in excellent agreement with conductivity-temperature-depth data obtained near the acoustic stations.