亚非副热带西风急流入口区位置及动能异常对中国华北盛夏年代际干旱的影响

魏建宁,张杰

Influence of the Position and Kinetic Energy Anomalies of the Inlet Region of the Asian-African Subtropical Westerly Jet on the Mid-Summer Interdecadal Drought in North China

Jianning WEI,Jie ZHANG

图2 1979 -2015年7月和8月200 hPa U分量的EOF第三模态空间分布（左）及其时间系数（右） (a)和(c)中黑线、 蓝线、 绿线分别为1979 -2015年、 1979 -1997年、 1997 -2015年的亚非急流20 m·s-1的平均位置

Fig.2 The third EOF mode spatial distribution of the 200 hPa U component （left） and its time coefficient (right) in July and August from 1979 to 2015.The black, blue and green lines are the average position of the Asian-African Subtropical Jet at 20 m·s-1 during 1979 -2015, 1979 -1997 and 1997 -2015, respectively