EFFECTS OF BOUNDARY LAYER FRICTION AND TOPOGRAPHY ON THE INSTABILITY OF BAROCLINIC WAVES

In this paper,the simultaneous effects of boundary layer and topography on the instability of Eady wave are investigated by using a new parameterization of the vertical velocity at the top of PBL and the influences of the stratification of the PBL,roughness and the slope of terrain are shown.Furthermore,the effects of the boundary layer friction and topography on generalized Eady wave are also investigated.

半封闭矩形海域中海底地形对旋转潮波系统的影响

为了探讨海底地形对旋转潮波系统的影响,本文对不同底形情况下的潮波运动进行了数值试验。根据试验结果绘制了同潮图并作了讨论。其结论是:(1)对无潮点相对于矩形海域中轴线的偏移来说,摩擦的影响和海底地形的影响可能都是重要的。如果是浅水区域,这种偏移主要是由摩擦引起的,但对平均水深较深、海底在横方向上有坡度的水域来说,底形效应是导致无潮点偏移的主要因素;(2)海底摩擦仅能使无潮点偏移到中轴线的左方(如果人们面向湾顶),而底形则可能使无潮点偏移到中轴线的左方或者中轴线的右方,这将取决于海底横向倾斜的方向。