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1 1961 -2014年7 -8月中国大陆PDSI的增长趋势的空间分布(a)和华北地区PDSI指数随时间的变化(b)
打点区域通过90%显著性检验
Fig.1 Spatial distribution of PDSI growth trend in China mainland (a) and the change of PDSI index with time in North China (b) in July and August during 1961 -2014.Dotted area has passed the significance test at 90%