北极III区海冰面积低频变化对北半球冬季大气环流异常的作用

Effect of the Low Frequency Variability of the Region III Arctic Sea Ice Cover upon the Northern Hemisphere Atmosphere General Circulation Anomaly in Winter

北极ＩＩ区海冰面积的低频变化所引起的热力强迫作用，可以激发出ＥＡ和类似于ＷＰ的大气遥相关型。冰气系统之间存在着３～４年的不规则振荡，在振荡过程中，它们是相互作用的。对比表明，北极ＩＩ区的重冰年和轻冰年。

The Eastern Atlantic pattern (EA) teleconnection and teleconnection like the western Pacific pattern (WP) can be aroused by the low frequency variability of the Region III Arctic sea ice cover. The irregular fluctuation of 3～4 years exists in the ice air system. In the process of this fluctuation, the ice and the air affect each other. The following conclusions are obtained from the analysis in this paper: (1) the characteristics of the atmospheric circulation in winter in the mid latitude region of the Northern Hemisphere show the bigger difference in the heavy ice years and in the light ice years of the Region III Arctic sea ice cover, and (2) the characteristics of the weather climate in China also show the bigger difference in the above two periods.