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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Internal hydraulics and mixing in a highly stratified estuary
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Internal hydraulics and mixing in a highly stratified estuary

机译：内部水力学和高度分层河口的混合

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Shipboard acoustic Doppler current profiler and conductivity-temperature-depth data obtained during highly stratified conditions in the Hudson River estuary along a section of variable width and breadth are presented. The observations emphasize tidal period asymmetries in the vertical structure of current and salinity. However, these asymmetries exhibit significant along-channel structure which is determined by channel morphology. During the ebb the flow is linearly sheared, and steep halocline slopes in the vicinity of channel contractions are maintained by momentum advection. A minimum in vertical shear across the: pycnocline occurs in channel contractions. During food the pycnocline sharpens and flattens with a middepth velocity maximum embedded in the pycnocline which separates a stratified surface layer from a bottom mixed layer. The along-channel structure in vertical shear is consistent with a lateral vorticity equation. Estimates of Richardson numbers suggest that vertical mixing across the pycnocline is enhanced downstream of channel contractions. [References: 18]
机译：给出了在哈德逊河河口高度分层条件下沿宽度和宽度可变的部分获得的舰载声学多普勒电流剖面仪和电导率-温度-深度数据。这些观察结果强调了潮流和盐度垂直结构中的潮汐期不对称性。然而，这些不对称表现出显着的沿通道结构，这是由通道形态决定的。在退潮期间，流量被线性剪切，并且通过动量对流保持通道收缩附近的陡峭的盐卤斜率。横断面：比诺可林的垂直切变最小发生在通道收缩中。在食物过程中，比考克林以埋藏在比考克林中的最大中深度速度最大值变尖和变平，该速度将分层的表层与底部混合层分开。垂直剪切中的沿通道结构与横向涡度方程一致。理查森数的估计表明，在比可可啉上的垂直混合在通道收缩的下游增强了。 [参考：18]

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