The Scattering at Low Frequencies of Coastally Trapped Waves
The Scattering at Low Frequencies of Coastally Trapped Waves
复制标题
沿海陷波的低频散射
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
E. Johnson
中科院分区：
文献类型：
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作者：
E. Johnson
摘要在一个特定的低频极限下描述了沿岸陷波的散射，其基本结果与动力学中分层和旋转的相对重要性无关。通过将注意力限制在与“剖面”频率N 0 H/L相比较小的频率上，可以取得进展，“剖面”频率N 0 H/L通过典型浮力频率N 0和平均陆架坡度（海洋深度H和陆架宽度L）的乘积来估计密度和陆架剖面的综合影响。结合正压陆架波散射的结果，目前的结果描述散射的强度无关的任何分层提供的唯一的运动的频率是小的惯性频率或剖面频率相比。在所有情况下，通过沿沿着等深线追踪入射压力场，直接得到透射波场。强烈的通知，以抑制散射在所有亚惯性频率，导致.
Abstract The scattering of coastally trapped waves is described in a particular low frequency limit where the fundamental results are independent of the relative importance of stratification and rotation in the dynamics. Progress is made possible by restricting attention to frequencies small compared to a “profile” frequency, N0H/L that estimates the combined effect of the density and shelf profiles through the product of a typical buoyancy frequency N0 and the average shelf slope (for ocean depth H and shelf width L. Combined with results on the scattering of barotropic shelf waves, the present results describe scattering irrespective of the strength of any stratification provided solely that the frequency of the motion is small compared to either the inertial frequency or the profile frequency. In all cases the transmitted wavefield follows directly by tracing an incident pressure field along coastal isobaths. Strong notification is shown to suppress scattering at all subinertial frequencies, leading to...