| 摘要: |
| 本文通过对卫星遥感图像中的内孤立波及相互作用现象进行统计分析，讨论了南海北部内孤立波及相互作用现象的时空分布特征，验证了利用卫星遥感图像反演内孤立波振幅和传播速度以及研究内波相互作用现象的可行性。统计结果表明，南海北部的内孤立波主要集中在东沙群岛以及海南岛南部，内波相互作用主要集中在东沙岛西北部以及海南岛南部。本文对此给出解释：内波传播至东沙岛附近发生绕射，绕射的内波分裂成两列后以不同的传播方向继续向西传播，相遇并发生相互作用；内波在海南岛浅滩处发生反射，与后续传来的内波发生相互作用。同时，本文利用Korteweg-de Vries（KdV）方程和Benjamin-One（BO）方程，结合观测数据，对内波振幅和传播速度进行了反演实验。反演所得的内波振幅和传播速度与南海北部实际内波振幅和传播速度相近。 |
| 关键词: 海洋内波 遥感 内波相互作用 内波振幅 南海北部 |
| DOI：10.11693/hyhz20190400065 |
| 分类号:P731.24 |
| 基金项目:国家自然科学基金项目，41576021号。 |
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| INTERNAL SOLITARY WAVE AND INTERACTION IN THE NORTHERN SOUTH CHINA SEA BASED ON REMOTE SENSING IMAGES |
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WANG Zhen-Xiao, WANG Cai-Xia
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College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| We analyzed the internal solitary waves (ISWs) and the interactions in the northern South China Sea (NSCS) from a large number of satellite remote sensing images to understand the characteristics of spatial and temporal distributions of ISWs and interactions. The results indicate that most of the interactions distributed in two regions:near the northwest of Dongsha Island and the south of Hainan Island. In the first region, ISWs propagate to the Dongsha Island and diffract. The diffracted ISWs split into two packets and keep propagating westward, and then interact with each other. In the second region, ISWs propagate to the Hainan Island and reflect, and the reflected ISWs interact with other ISWs. In addition, we combined the in-situ measured data and satellite remote sensing images to simulate the amplitudes and phase speeds of the studied ISWs based on KdV equation and Benjamin-One equation. The results obtained from satellite images are in good agreement with the internal wave amplitudes and phase speeds of the actual region of the northern South China Sea. |
| Key words: internal solitary wave remote sensing images internal wave interaction internal wave amplitudes northern South China Sea |
