Internal solitary waves in the central Andaman sea observed by combining mooring data and satellite remote sensing

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2024-06-01 DOI:10.1016/j.csr.2024.105249

Lina Sun , Yanliang Liu , Junmin Meng , Yue Fang , Qinglei Su , Chao Li , Hao Zhang

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引用次数: 0

Abstract

The behavioral characteristics of internal solitary waves (ISWs) in the central Andaman Sea were revealed by analyzing multisource satellite remote sensing images combined with synchronous mooring data. The relationship between the generation time and tides of ISWs in the central Andaman Sea was analyzed and discussed. The ISWs in the central Andaman Sea exhibit a notable semidiurnal tidal cycle, primarily occurring during the spring tide. Additionally, it was observed that larger currents can generate ISWs with larger amplitudes. The propagation velocity of the ISWs initially increases and then decreases from the source, with no significant overall change in the deep areas. Based on the analysis of satellite remote sensing images that cover the source of ISWs in the central Andaman Sea, the generation time of ISWs was estimated. A comparison was made between the estimated generation time and the tidal flow predicted from the TPXO 9 global tidal model at the location of the ISW source. It was found that ISWs are generated when the westward tidal flow reaches its maximum. The ISWs in the central Andaman Sea are generated between the islands of Car Nicobar and Teresa Island. They propagate eastward into the Andaman Sea, grow in amplitude, split into multiple waves, dissipate, and vanish in the waters near the Danao Islands. The entire life cycle of these waves lasts for approximately 3∼4 days.

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结合系泊数据和卫星遥感观测安达曼海中部的内孤波

通过分析多源卫星遥感图像和同步系泊数据，揭示了安达曼海中部内孤波（ISWs）的行为特征。分析并讨论了安达曼海中部内孤波的产生时间与潮汐之间的关系。安达曼海中部的 ISWs 呈现出明显的半日潮汐周期，主要发生在春潮期间。此外，还观察到较大的洋流会产生振幅较大的 ISW。从源头开始，ISW 的传播速度先增大后减小，在深海区域总体变化不大。根据对覆盖安达曼海中部 ISWs 源头的卫星遥感图像的分析，估算了 ISWs 的生成时间。将估算的生成时间与 TPXO 9 全球潮汐模型预测的 ISW 水源地潮汐流量进行了比较。结果发现，ISW 是在西向潮流达到最大值时产生的。安达曼海中部的 ISW 在 Car Nicobar 岛和 Teresa 岛之间产生。它们向东传播到安达曼海，振幅越来越大，分裂成多个波浪，消散后消失在达瑙群岛附近的海域。这些海浪的整个生命周期大约持续 3∼4 天。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.