海河流域夏季降水关键区季内演变及其环流配置的定量化分析
何丽烨, 程善俊, 马宁, 郭军

Intraseasonal evolution of the key areas of precipitation in the Haihe River Basin and quantitative analysis of its associated atmospheric circulation during summer
HE Liye, CHENG Shanjun, MA Ning, GUO Jun
图6 1961-2015年夏季各月东北冷涡指数与海河流域降水显著相关区(置信度水平达95%)的季内变化
Fig. 6 Intraseasonal variations of significant correlation areas (the values exceed 95% confidence level) relating to the Northeast Cold Vortex Index (NECVI) for precipitation in the Haihe River Basin in summerduring 1961-2015