中国北方地区寒潮时空特征及其成因分析

乔雪梅, 刘普幸

The temporal and spatial characteristics and genesis of cold wave in northern China

Xuemei QIAO, Puxing LIU

图5 1960 - 2017年AO指数序列

Fig.5 Arctic Oscillation index series from 1960 to 2017