On the Dynamics of Wind-Driven Lake Currents
On the Dynamics of Wind-Driven Lake Currents
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风驱动湖流动力学
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
J. Bennett
中科院分区：
文献类型：
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作者：
J. Bennett
摘要本文分析了两种随时间变化的“垂直剖面模型”，并将其应用于安大略湖的风海流。这些模型是：1）一个线性无摩擦，两个层次的模型，和2）一个数值模型，其中包括摩擦和非线性条款。他们预测当前和温度的假设下，所有变量，除了压力是独立的沿岸坐标。沿岸压力梯度是根据垂直于横截面的体积输运为零的条件计算的。首先，研究了线性无摩擦模型的准静态响应，以隔离地形和层化对沿岸流结构的影响。它预测，垂直平均沿岸流是独立的旋转和分层，是在风的方向，水是浅于平均水平和相反的风在深水。在均匀的条件下，最强的电流被限制在一个薄的（1.3公里宽的…
Abstract Two time-dependent “vertical cross section models” are analyzed and applied to wind-driven currents in Lake Ontario. The models are: 1) a linear frictionless, two-level model, and 2) a numerical model which includes both friction and nonlinear terms. They predict current and temperature under the assumption that all variables except pressure are independent of the longshore coordinate. The longshore pressure gradient is computed from the condition that the volume transport normal to the cross section is zero. First, the quasi-static response of the linear frictionless model is studied to isolate the effects of topography and stratification on the structure of the coastal currents. It predicts that the vertically averaged longshore current is independent of both rotation and stratification, being in the direction of the wind where the water is shallower than average and opposite the wind in the deep water. Under homogeneous conditions, the strongest currents are confined to a thin (∼3 km wide for ...