陕西暖季雷暴的主模态及其可能的影响机制
张宏芳1, 潘留杰2, 侯建忠2, 李明娟2

The Major Mode of the Shaanxi Thunderstorm and Possible Influence Mechanism
Zhang Hongfang1, Pan Liujie2, Hou Jianzhong2, Li Mingjuan2
图8 1960—2010年陕西暖季雷暴EOF2时间系数与北半球极涡特征指数 (a)EOF2时间系数;(b)极涡位置;(c)极涡强度;(d)极涡中心强度;(e)极涡面积;图中曲线为11a滑动平均
Fig.8 The time coefficient of Shaanxi warm season thunderstorm EOF2 and NH’s polar vortex index from 1960 to 2010 a The time coefficient of EOF2;b Polar vortex position;c Polar vortex strength; d Polar vortex centre strength; e Polar vortex area.Thick curve:11-years running mean