A simple model of fjord and coastal circulation interaction
A simple model of fjord and coastal circulation interaction
复制标题
峡湾与沿海环流相互作用的简单模型
DOI：
--
复制
发表时间：
1981
期刊：
影响因子：
--
通讯作者：
H. Svendsen
中科院分区：
文献类型：
--
作者：
J. Klinck;J. O'Brien;H. Svendsen
摘要采用线性两层数值模型研究了狭窄峡湾与风力海岸的动力相互作用。科里奥利加速度在海岸状态下很重要，但在峡湾动力状态下由于v = 0而被认为不重要。对于各种各样的风条件、底部地形和模式参数，风强迫海岸环流及其沿岸地转流对峡湾内的环流有很强的影响。这些地转流控制着峡湾口的自由面和斜斜位移，从而强烈地影响着峡湾环流。这种机制是一种替代的经典思想液压控制在嘴的技巧或收缩。模型模拟结果还表明，自由表面坡度是斜压效应，而滨风和滨风对峡湾的影响是不同的。沿岸的风产生洪水，而上下峡湾的风只是停留在水面上。我们发现离岸赢了…
Abstract The dynamical interaction of a narrow fjord with a wind-driven coastal regime is investigated using a linear, two-layer numerical model. The Coriolis acceleration is important in the coastal regime but assumed to he unimportant in the fjord dynamical because v = 0. For a wide variety of wind conditions, bottom topography and model parameters, the wind-forced coastal circulation, with its geostrophic alongshore currants, has a strong effect on the circulation within the fjord. These geostrophic currents control the free surface and pycnocline displacement at the fjord mouth, thereby strongly affecting fjord circulation. This mechanism is an alternative to the classical idea of hydraulic control at the mouth by sills or constrictions. Model simulators also show that the free surface slope is a baroclinic effect and that alongshore and across-shore winds affect the fjord differently. Alongshore winds produce flooding while up- and down-fjord winds simply sat up the surface. We find that offshore win...