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首页> 外文期刊>Journal of Physical Oceanography >A Modeling Study of Coastal-Trapped Wave Propagation in the Gulf of California. Part Ⅰ: Response to Remote Forcing
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A Modeling Study of Coastal-Trapped Wave Propagation in the Gulf of California. Part Ⅰ: Response to Remote Forcing

机译：加利福尼亚湾沿海捕获波传播的建模研究。第一部分：对远程强迫的反应

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摘要

The evolution of remotely forced coastal-trapped waves in the Gulf of California is studied using a hydrostatic primitive equation model. The sea level time variability at a remote station south of the gulf is assumed to propagate northward into the gulf as a mode-1 coastal-trapped wave (CTW). To validate this assumplion, observations and model results are compared. In general, sea level fluctuations are reasonably well represented by the model, with model-data correlations decreasing from 0.76 at Topolobampo, close to the entrance of the gulf, to 0.52 at Santa Rosalia in the central gulf. Model-data correlations of velocity are lower (<0.6). In the gulf, CTWs propagate northward along the east side with no significant changes south of the sill, which is 600 km north of the entrance. When incident waves propagating northward in the gulf along the east side arrive at the sill, a small fraction of the wave energy enters the northern gulf and is dissipated. Most of the wave energy is steered at the sill to the west side of the gulf where it propagates southward with decreased sea level amplitude. The weakened waves leave the gulf at the southwest boundary approximately 6-7 days after entering. Some of the incident wave energy is lost into downslope propagating disturbances generated as the CTWs pass, resulting in relatively intense bottom currents. Wave disturbances exhibit nonlinear characteristics while propagating. For example, isopycnal displacements in the wave fronts steepen. This occurs primarily for waves of sea level elevation. The contribution of remotely forced CTWs in the Gulf of California to the total kinetic energy is comparable to that produced by the wind.
机译：使用流体静力学原始方程模型研究了加利福尼亚湾中远程强迫沿海陷波的演化。假定在海湾以南的一个偏远站的海平面时变性以模式1沿海陷波（CTW）的方式向北传播到海湾中。为了验证这种假设，比较了观察结果和模型结果。通常，该模型可以很好地表示海平面的波动，模型数据的相关性从靠近海湾入口的托波洛邦波的0.76降低到中央海湾圣罗莎莉亚的0.52。速度的模型数据相关性较低（<0.6）。在海湾中，CTWs沿东侧向北传播，而在入口以北600公里的窗台以南没有明显变化。当沿东侧在海湾中向北传播的入射波到达门槛时，一小部分的波能进入北海湾并被消散。大部分波能在门槛处被引导到海湾的西侧，在那里向南传播，海平面振幅减小。进入后约6-7天，减弱的海浪离开西南边界的海湾。某些入射波能量会损失到下坡传播传播的干扰中，这些干扰会随着CTW的通过而产生，从而导致相对较高的底部电流。波干扰在传播时表现出非线性特性。例如，波前的等距位移变陡。这主要发生在海平面升高的波浪中。加利福尼亚湾的偏航CTW对总动能的贡献与风产生的相当。

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