The nonlinear equatorial Kelvin wave
The nonlinear equatorial Kelvin wave
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非线性赤道开尔文波
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
J. Boyd
中科院分区：
文献类型：
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作者：
J. Boyd
摘要利用应变坐标方法，导出了非线性赤道开尔文波的一致有效近似。结果表明，对于与几内亚湾上升流相关的开尔文波，非线性效应可以忽略不计。然而，厄尔尼诺现象中涉及的开尔文波在形状和速度上都发生了严重的扭曲。前缘是平滑和扩张的，而不是陡峭的，但后缘将形成锋利的前缘，并最终破裂。
Abstract Using the method of strained coordinates, a uniformly valid approximation to the nonlinear equatorial Kelvin wave is derived. It is shown that nonlinear effects are negligible for the Kelvin waves associated with the Gulf of Guinea upwelling. The Kelvin waves involved in El Nino, however, are significantly distorted both in shape and speed. The leading edge is smoothed and expanded rather than steepened, but the trailing edge will form sharp fronts and eventually break.