Dependence of Wind-Driven Current on Wind Stress Direction in a Small Semienclosed, Homogeneous Rotating Basin
Dependence of Wind-Driven Current on Wind Stress Direction in a Small Semienclosed, Homogeneous Rotating Basin
复制标题
DOI：
10.1175/2010jpo4363.1
复制
发表时间：
2010-07
影响因子：
3.5
通讯作者：
H. Hinata;N. Kanatsu;S. Fujii
中科院分区：
文献类型：
--
作者：
H. Hinata;N. Kanatsu;S. Fujii
摘要利用基于Ekman解的线性稳态解析模型，研究了小型半封闭均质旋转水池中的风海流与风应力方向的关系。该模型适用于流域中部（midbasin），水流由任意方向的恒定风应力驱动。WDC由风应力驱动电流（WSDC）和压力驱动电流（PDC）组成。流域的横向变化的水深限制了总体积输运在纵向上，而风应力驱动的体积输运根据风应力方向改变方向。因此，压力驱动的体积输送或等效的压力梯度取决于风应力方向：压力梯度和风应力之间的关系是各向异性的。因此，中流域WDC也依赖于风应力方向。这种依赖性根据横向位置和横向位置而变化。
Abstract The dependence of wind-driven current (WDC) on wind stress direction in a small semienclosed, homogeneous rotating basin is investigated using a linear steady-state analytical model based on Ekman solutions. The model is applicable to the middle of the basin (midbasin), and the current is driven by a constant wind stress of an arbitrary direction. The WDC is made up of wind stress–driven current (WSDC) and pressure-driven current (PDC) components. The laterally varying water depth of the basin confines the total volume transport in the longitudinal direction while the wind stress–driven volume transport changes direction according to the wind stress direction. Therefore, the pressure-driven volume transport or, equivalent, the pressure gradient depends on the wind stress direction: the relationship between the pressure gradient and the wind stress is anisotropic. As a result, the midbasin WDC is also dependent on the wind stress direction. The dependence varies according to the lateral position a...