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