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首页> 外文会议>2006 IEEE US/EU Baltic International Symposium >Underwater wave phenomena in the upper ocean and their surface manifestation: Role of nonlinearity
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Underwater wave phenomena in the upper ocean and their surface manifestation: Role of nonlinearity

机译：上层海洋中的水下波现象及其表面表现：非线性的作用

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In this contribution, we present the review of recently developed models of surface manifestation of underwater processed in the upper ocean and some results of their verification in laboratory and field experiments. Influence of modulation of wind growth rate on variability of short gravity surface waves is discussed. This effect is demonstrated to be the most important for forming the hydrodynamic contract of the waves in the field of the swell wave, although it make essential contribution to modulation of surface waves by the field of meso-scale currents internal gravity waves, flows above bottom topography). The nonlinearity of the wind-wave interaction determines the phase of surface wave modulation wit respect to meso-scale flow. Some results of the field experiments are presented. For example, field measurements in the Black Sea, the Norwegian Sea and Barents Sea demonstrated strong variability of the surface wave spectra and associated variability of the surface wind in the vicinity of the underwater local bottom ele-vation. We compared the experimental data an the developed theory, which demonstrates very good quantitative agreement. Also we discuss possibility of detection of a tsunami wave in the upper ocean by modulation of radio-waves scattered by waved rough water surface. A first example of observation of modulation of the cross-section of the radar altimeter on the satellite Jason-1 by the tsunami in the upper ocean 26 December 2004 is presented. The possible mechanism of the modulation is proposed based on the effect of modulation of the growth rate of weakly nonlinear surface waves. We discuss influence of nonlinearity of spectrally narrow train of surface waves on its transformation in the field of inhomogeneous surface current. The asymptotical model is constructed based on taking into account dispersion and nonlinear effects of high order, the numerical modeling of propagation of a surface wave train is performed. The results of the model are c- mpared with the date of laboratory modeling in the large thermostratified tank of IAP.
机译：在此贡献中，我们介绍了最近开发的在上层海洋中处理的水下表面表现模型的综述，以及在实验室和现场实验中对其进行验证的一些结果。讨论了风速调制对短重力面波变化的影响。事实证明，这种效应对于在浪涌波场中形成波的流体动力收缩最重要，尽管它对由底部上方流动的中尺度电流内部重力波场对表面波的调制做出了重要贡献。地形）。风波相互作用的非线性决定了与中尺度流有关的表面波调制的相位。介绍了现场实验的一些结果。例如，在黑海，挪威海和巴伦支海的野外测量表明，在水下局部海底隆起附近，表面波谱具有很强的可变性，并且表面风也具有相关的可变性。我们将实验数据与发达的理论进行了比较，证明了很好的定量一致性。我们还将讨论通过调制波浪状粗糙水面散射的无线电波来探测上层海洋海啸的可能性。提出了观察2004年12月26日海啸对Jason-1卫星雷达高度计的横截面进行调制的第一个例子。基于弱非线性表面波的增长率对调制的影响，提出了可能的调制机制。我们讨论了在不均匀的表面电流领域中，窄谱波表面波的非线性对其转换的影响。在考虑色散和高阶非线性效应的基础上构建渐近模型，进行了表面波列传播的数值模拟。该模型的结果与IAP大型热分层罐中的实验室建模日期进行了比较。

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