南半球冬季风场低频振荡的活动及演变特征

THE ACTIVITY AND EVOLUTIONAL CHARACTERISTICS OF LOW FREQUENCY OSCILLATION IN FLOW FIELDS IN SOUTHERN WINTER

本文运用ECMWF的低频带通滤波资料,利用方差分析、Hovm(?)ller图和单点相关的分析方法,对1984年6—9月南半球200hPa风场进行研究,得到了准40天振荡的活动分布及位相传播、能量频散等演变特征。

Using low-frequency bandpass-filtered data, flow fields at 200hPa for Southern Hemisphere went through analyses of variance, Hovrnbller diagrams and single station correlation. The activity distribution and evolutional characteristics, such as phase propagation and energy dispersion, are obtained.