Topographic Rectification of Tidal Currents
Topographic Rectification of Tidal Currents
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潮汐地形矫正
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
W. Young
中科院分区：
文献类型：
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作者：
W. Young
本文用矩量法讨论了海底低岸斜坡上振荡潮流的矫正问题。这种方法以前已被用于剪切弥散的研究，它是用来分析对流扩散方程。在本问题中，它被应用到正压位涡方程线性振荡，空间均匀的潮汐速度。为了应用这种方法，必须假定地形只产生很小的深度变化。该方法经济地提供了最重要的定性性质（例如，时间平均电流的传输、位置和宽度）。这些结果是在不作谐波截断的情况下得到的。然后，他们可以用来评估其他作者使用的谐波截断近似的准确性。结果表明，谐波截断正确预测的运输和位置的整流电流时，银行低。然而，如果银行的宽度远小于...
Abstract The rectification of oscillatory tidal currents on the sloping sides of a low submarine bank is discussed using the moment method. This method has been previously used in shear dispersion studies where it is used to analyze the advection-diffusion equation. In the present problem it is applied to the barotropic potential vorticity equation linearized about an oscillatory, spatially uniform tidal velocity. To apply the method it is necessary to assume that the topography produces only a small change in depth. The method economically provides the most important qualitative properties (e.g., transport, location and width) of the time averaged current. These results are obtained without making an harmonic truncation. They can then be used to assess the accuracy of the harmonic truncation approximation used by other authors. It is shown that harmonic truncation correctly predicts the transport and location of the rectified current when the bank is low. However if the width of the bank is much less tha...