本文计算了亚洲500毫巴月平均环流指数的方差谱。
In this paper, the power spectrum of the monthly 500 MB circulation index over Asia has been calculated.
分析结果表明：北半球月平均环流异常在垂直方向上具有明显的相当正压性结构特征。
The results show that there is a significant equivalent barotropic feature in the vertical direction of the monthly mean geopotential height anomalies over the Northern Hemisphere .
结果表明：北半球月平均环流异常年际演变的过程具有准周期特征及不连续的跃变现象。
The results show: there are the quasi-periodic features and unsuccessive jump phenomena in the interannual variation processes of Northern Hemisphere monthly mean general circulation anomalies.
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