Periodic Wind-Driven Circulation in an Elongated and Rotating Basin
Periodic Wind-Driven Circulation in an Elongated and Rotating Basin
复制标题
细长旋转盆地中的周期性风驱动环流
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
A. Ponte
中科院分区：
文献类型：
--
作者：
A. Ponte
Abstract An idealized model is developed for the three-dimensional response of a coastal basin (e.g., lagoon, bay, or estuary) to time-periodic wind stress. This model handles basins that are deeper and/or shallower than an Ekman depth with wind forcing frequencies ranging from subinertial to superinertial. Here the model is used to describe how the response (current and sea level) of a basin deeper than one Ekman depth depends on the wind forcing frequency. At low subinertial frequencies, the response is similar to the steady wind case and is hence called “quasi steady.” There is a near-surface Ekman transport to the right of the wind balanced by a return flow at depth. Lateral bathymetric variations introduce an along-basin circulation that decays with increasing frequency and sets the extent of the quasi-steady response in the frequency domain. At the inertial frequency, the wind forces a damped resonant response with large vertical shear and weak depth-integrated flow. This result is potentially impor...
