南海陆坡区约束流核型内孤立波观测研究

发布时间：2019-01-07 21:32

【摘要】：本文基于南海陆坡区内孤立波的观测,对内孤立波的基本特征进行了研究,经分析得到其振幅为45m,最大水平流速可达1.6m·s-1,最大垂向流速为0.39m·s-1,传播速度为1.46m·s-1。将内孤立波经过时的流速、温盐特征进行了对比分析,结果表明,该内孤立波引起水质点的最大水平流速大于其传播速度,即umaxc,形成了约束流核;在内孤立波核心处水体密度近乎一致,N2接近于0,理查德森数Ri0.25,发生了剪切不稳定。基于内孤立波的振幅并结合背景场温盐剖面,对内孤立波引起的温盐场起伏进行反演,并对其动能、势能进行了估算。
[Abstract]:Based on the observation of solitary waves in the continental slope of the South China Sea, the basic characteristics of the internal solitary waves are studied in this paper. The results show that the amplitude is 45 m, the maximum horizontal velocity is 1.6 m s -1, and the maximum vertical velocity is 0.39 m s -1. The velocity of propagation is 1.46ms-1. The velocity and temperature characteristics of internal solitary wave are compared and analyzed. The results show that the maximum horizontal velocity of water quality caused by the internal solitary wave is greater than its propagation velocity, that is, umaxc, forms a confined flow core. The water density at the core of the inner solitary wave is almost the same, the N _ 2 is close to 0, and the Richardson number Ri0.25, is shearing instability. Based on the amplitude of the internal solitary wave and the temperature and salt profile of the background field, the fluctuation of the temperature and salt field caused by the internal solitary wave is inversed, and its kinetic energy and potential energy are estimated.
【作者单位】：中国海洋大学物理海洋实验室;
【基金】：国家重点基础研究发展计划项目(2014CB745003) 国家高技术研究发展计划项目(2013AA09A502) 国家自然科学基金项目(41176008;41176010)资助~~
【分类号】：P731.24

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