山西极端暴雨环流特征及水汽异常研究

周晋红, 王秀明, 田晓婷, 张泽秀, 李树文, 蔡晓芳

Study on circulation characteristics and water vapor anomaly of extreme rainstorm events in Shanxi Province

ZHOU Jinhong, WANG Xiuming, TIAN Xiaoting, ZHANG Zexiu, LI Shuwen, CAI Xiaofang

图3 700 hPa低涡型极端暴雨发生期间环流合成场（黑色实线为500 hPa平均位势高度，单位：dagpm；箭矢和彩色填色分别为700 hPa平均风场和风速，单位：m·s-1）（a），2012年7月21日08：00 500 hPa位势高度（黑色实线，单位：dagpm）、700 hPa风场（箭矢）和风速（彩色填色）（单位：m·s-1）、200 hPa≥40 m·s-1风速区（紫色实线，单位：m·s-1）（b），2012年7月20日20:00—21日20:00山西省降水量（单位：mm）空间分布（c） （红色实线区域为山西省。下同）

Fig.3 Circulation composite field during the occurrence of 700 hPa low vortex pattern extreme rainstorms (black solid lines represent average geopotential height on 500 hPa, Unit: dagpm; arrow vectors and color shaded represent 700 hPa average wind field and wind speed, respectively, Unit: m·s-1) (a), 500 hPa geopotential height field (black solid lines, Unit: dagpm), 700 hPa wind field (arrow vectors) and wind speed (color shaded) (Unit: m·s-1), the area of wind speed greater than or equal to 40 m·s-1 on 200 hPa (purple solid lines, Unit: m·s-1) at 08:00 on 21 July 2012 (b), the spatial distribution of precipitation (Unit: mm) in Shanxi Province from 20:00 on 20 to 20:00 on 21 July 2012 (c) (The red solid line area is Shanxi Province. the same as below)