Internal Wave Reflection on Shelf Slopes with Depth-Varying Stratification
Internal Wave Reflection on Shelf Slopes with Depth-Varying Stratification
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DOI：
10.1175/jpo-d-11-0192.1
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发表时间：
2013-03
影响因子：
3.5
通讯作者：
R. Hall;J. Huthnance;Richard G. Williams
中科院分区：
文献类型：
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作者：
R. Hall;J. Huthnance;Richard G. Williams
对于均匀分层和线性坡度，内波从斜坡地形的反射是很容易预测的。然而，深度变化分层的复杂性，该地区的斜坡可能是亚临界和其他地区的超临界。在这里，一个数值模型是用来模拟模式1，M2内潮接近陆架斜坡均匀和深度变化的分层。入射内波能量的分数反射回离岸和传输到货架上的诊断计算的能量通量的基础上的斜坡（有和没有地形），并在货架上休息。对于本研究中考虑的分层/地形，对于均匀分层和深度变化分层，反映给定坡度临界状态的能量分数相似。这表明反射的分数仅取决于最大斜率临界性，而与密度跃层的深度无关。大部分反射的能量流都在...
AbstractReflection of internal waves from sloping topography is simple to predict for uniform stratification and linear slope gradients. However, depth-varying stratification presents the complication that regions of the slope may be subcritical and other regions supercritical. Here, a numerical model is used to simulate a mode-1, M2 internal tide approaching a shelf slope with both uniform and depth-varying stratifications. The fractions of incident internal wave energy reflected back offshore and transmitted onto the shelf are diagnosed by calculating the energy flux at the base of slope (with and without topography) and at the shelf break. For the stratifications/topographies considered in this study, the fraction of energy reflected for a given slope criticality is similar for both uniform and depth-varying stratifications. This suggests the fraction reflected is dependent only on maximum slope criticality and independent of the depth of the pycnocline. The majority of the reflected energy flux is in ...