西北干旱区一次极端暴雨局地性增强的对流环境特征
傅朝(), 刘维成(), 宋兴宇, 徐丽丽, 沙宏娥, 马莉, 崔宇
Local enhanced convective environment characteristics of an extreme rainstorm event in arid region of Northwest China
FU Zhao(), LIU Weicheng(), SONG Xingyu, XU Lili, SHA Honge, MA Li, CUI Yu

图12. 2022年8月12日22:00 850 hPa比湿(等值线,单位g·kg-1)、锋生函数(彩色填色区,单位K·m-1·s-1)、风(箭矢,单位:m·s-1)(a)和23:00地面大于等于12 ℃露点温度(黑色等值线,单位:℃)、冷锋(蓝色齿线)、干线(黑色圆齿线)(b)以及12日23:00(c)和13日00:00(d)锋生函数(彩色填色区,单位:K·m-1·s-1)、垂直速度(等值线,单位:hPa·s-1)、风(箭矢,水平风在剖面方向投影与垂直速度合成,单位:m·s-1)的垂直剖面
(红色字母T是冷锋和干线的三分点位置)

Fig.12. The specific humidity (isolines, Unit: g·kg-1) and frontogenesis function (color shaded areas, Unit:K·m-1·s-1), wind (arrow vector , Unit:m·s-1) at 850 hPa at 22:00 BST on August 12 (a), surface dewpoint temperature greater than or equal to 12 ℃ (black isolines, Unit: ℃), cold front (blue tooth-line), dryline (black circular tooth-line) at 23:00 BST on August 12 (b),and vertical profiles of frontogenesis function (color shaded areas, Unit: K·m-1·s-1), vertical velocity (gray isolines, Unit: hPa·s-1), wind (arrow vector, composite of vertical velocity with projection of horizontal wind on the profile, Unit: m·s-1) at 23:00 BST on August 12 (c) and 00:00 BST on August 13 (d), 2022
(The red letter T is three-point position of the cold front and the dryline)