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6 1960—2010年陕西暖季雷暴EOF2对应的时间系数对各气象要素场的回归 （a）海平面气压场；（b）500 hPa位势高度场；（c）850 hPa风场；（d）200 hPa纬向风场
Fig.6 The regression map of warm season thunderstorm on the normalized first principal component PC2 over Shaanxi province for period 1960 to 2010 a Sea level pressure；b 500 hPa geopotential height； c 850 hPa wind； d 200hPa zonal wind on the normalized first principal componentPC2