巴厘岛海域海洋内波的卫星遥感观测与数值模拟分析

巴厘岛海域海洋内波的卫星遥感观测与数值模拟分析4·21印尼潜艇失事事件原因初探

基金项目: 国家自然科学基金（42006193，41876201）；国家杰出青年科学基金（42025605）

1.
Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Number 18, The 91001 Unit of PLA, Beijing 100166, China

摘要: 基于巴厘岛北部海域海洋内波卫星遥感观测与数值模拟结果，本文对4·21印尼潜艇失踪事件原因进行了初步分析。结果表明，在印尼潜艇失事海域和时间，源于龙目海峡的海洋内波向北传播并广泛分布于巴厘岛北部海域，振幅可达50 m。潜艇很可能遭遇了大振幅海洋内波发生“掉深”而导致失事。
- 巴厘岛海域 /
- 海洋内波 /
Abstract: The possibility of the Indonesian submarine wreck on 20 April 2021 was analyzed based on satellite remote sensing observation and numerical simulation. The results indicate that large-amplitude oceanic internal waves, estimated to be approximately 50 m using satellite images, originate from the Lombok Strait. They are widely distributed to the north of the Bali Island and are suggested to cause an abrupt sinking of the Indonesian submarine.
- north of Bali Island /
- oceanic internal wave /
- submarine wreck

图 1 巴厘岛海域获取的两景MODIS遥感影像，成像时间为2021年4月19日03:00 UTC（上）和4月21日02:50 UTC（下）。图中白色箭头指示观测到的内波波包。

Fig. 1 Two MODIS images acquired around the Bali Island at 03:00 UTC on April 19, 2021 (top) and at 02:50 UTC on April 21, 2021 (bottom), respectively. The white arrows mark the observed internal waves in the images

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图 2 利用射线追踪法模拟的4月21日02:50−18:50 UTC时间段内龙目海峡海洋内波的传播过程。背景彩色为M₂内潮体积产生力，蓝色实线为在4月19日03:00 UTC MODIS影像(图1上图)上观测到的内波条纹，红色实线为在4月21日02:50 UTC MODIS影像(图1下图)上观测到的内波先导波，黑色实线为模拟的间隔1小时的内波波峰线位置，黑色实心点标注的是潜艇被发现的位置。

Fig. 2 Propagation of the internal waves from the LOMBOK strait simulated by the ray tracing method. The background color indicates the distribution of the maximum depth-integrated body force for the M₂ constituent. The blue and red lines represent the leading wave front observed from the MODIS image acquired on April 19, 2021 and April 21, respectively. The black lines represent the simulated wave fronts in one-hour time step. The black solid dot marks the location where the sunken submarine was discovered

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