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首页> 外文期刊>Journal of Physical Oceanography >Refraction of Surface Gravity Waves by Shear Waves
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Refraction of Surface Gravity Waves by Shear Waves

机译:剪切波对表面重力波的折射

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Previous field observations indicate that the directional spread of swell-frequency (nominally 0.1 Hz) surface gravity waves increases during shoreward propagation across the surf zone. This directional broadening contrasts with the narrowing observed seaward of the surf zone and predicted by Snell's law for bathymetric refraction. Field-observed broadening was predicted by a new model for refraction of swell by lower-frequency (nominally 0.01 Hz) current and elevation fluctuations. The observations and the model suggest that refraction by the cross-shore currents of energetic shear waves contributed substantially to the observed broadening.
机译:先前的现场观察表明,在整个海浪区域向岸传播期间,激增频率(名义上为0.1 Hz)表面重力波的定向扩展增加。这种方向性的加宽与海浪区域的观察到的向海变窄形成对比,后者由斯涅尔定律进行测深折射预测。通过低频(标称频率为0.01 Hz)电流和高程波动引起的膨胀折射的新模型,可以预测现场观察到的展宽。观测和模型表明,高能剪切波跨岸流的折射对观测到的展宽大有贡献。

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