Emphasis isput on the characteristics of Ekman spirals over the sloped terrain. Conditions in which Ekman spirals move counterclockwise (ccw) and therelationship between frictional force and Ekman spiral pattern are givenas well.

• 着重讨论斜坡地形上的Ekman螺线的特性,指出Ekman螺线出现反时针旋转的条件,并给出摩擦力项与Ekman螺线旋转方式的关系。