Exact Solutions of Wind-Driven Coastal Upwelling and Downwelling over Sloping Topography
Exact Solutions of Wind-Driven Coastal Upwelling and Downwelling over Sloping Topography
复制标题
DOI：
10.1175/2011jpo4527.1
复制
发表时间：
2009-12
影响因子：
3.5
通讯作者：
P. Choboter;Danah Duke;Joseph Patrick Horton;Paul Sinz
中科院分区：
文献类型：
--
作者：
P. Choboter;Danah Duke;Joseph Patrick Horton;Paul Sinz
本文用一个简化的动力学模式研究了海岸风驱动上升流和下降流的动力学。精确的解决方案被检查作为一个函数的时间和一个家庭的倾斜地形。在二维模型中的假设包括一个无摩擦的海洋内部以下的表面埃克曼层和没有沿斜坡的变量的依赖性，但是，在横坡和垂直方向的依赖性被保留。密度和沿坡分量的动量平流的横坡速度，与热风平衡保持在任何时候。在初始层化常数和无初始顺坡流的条件下，求解了时变初值问题。以前，这个模型已被用来研究上升流在平底海洋，但在这项工作中的新功能是一个家庭的倾斜地形剖面的精确解的研究，上升流和下降流。精确的解决方案相比，从原始方程的数值解…
AbstractThe dynamics of wind-driven coastal upwelling and downwelling are studied using a simplified dynamical model. Exact solutions are examined as a function of time and over a family of sloping topographies. Assumptions in the two-dimensional model include a frictionless ocean interior below the surface Ekman layer and no along-slope dependence of the variables; however, dependence in the cross-slope and vertical directions is retained. Density and the along-slope component of momentum are advected by the cross-slope velocity, with thermal wind balance maintained at all times. The time-dependent initial value problem is solved with constant initial stratification and no initial along-slope flow. Previously, this model has been used to study upwelling over flat-bottomed ocean, but the novel features in this work are the study of exact solutions for a family of sloping topographic profiles, for both upwelling and downwelling. The exact solutions are compared to numerical solutions from a primitive equat...