Abstract: Ekman vertical velocity of atmospheric boundary layer was calculated by using GCM data and the new Ekman Pumping formula given by Tan(2000), in which complex boundary was included for stratified atmosphere. The results show: (1) the vertical velocity of atmospheric boundary layer in most areas is about 10^-３m/s, but the velocity over Tibetan Plateau can reach 10^-２m/s; (2) the distribution of vertical velocity over Tibetan Plateau during winter is significantly different from that in summer, which is closely related to the dominant winds over this area. The characteristics of the Ekman vertical velocity obtained here with the new Ekman Pumping formula are compared with those obtained with the classic formula.

Key words: Ekman Pumping, atmospheric boundary layer, inhomogeneous boundary layer

摘要： 利用GCM模式资料和Tan最新得到的具有复杂边界的层结大气边界层的Ekman泵公式，计算了大气边界层顶的Ekman垂直速度。结果表明，除青藏高原外，一般地区的大气边界层顶垂直速度的量级为每秒零点几厘米。在青藏高原地区，大气边界层顶的垂直速度可达每秒几厘米的量级，其分布类型在冬季和夏季显著不同，与该地区的盛行风系紧密相关。将新的Ekman泵公式的结果与经典的Ekman泵公式的计算结果进行比较，讨论了二者间的异同。

关键词: Ekman泵, 大气边界层, 非均匀边界层