“21·7”河南省焦作市连续性极端暴雨过程分析  

“21·7” Continuous Extreme Heavy Rainfall Event Analysis in Jiaozuo City Henan Province

作　　者：闫小利 牛广山 叶东 尹金娟 岳超 崔文倩 张梦彤 

机构地区：[1]河南省焦作市气象局,河南 焦作 [2]河南省新乡市气象局,河南 新乡

出　　处：《气候变化研究快报》2024年第3期543-551,共9页Climate Change Research Letters

摘　　要：利用常规气象资料和NCEP (1˚ × 1˚)逐6 h格点资料,分析了2021年7月18日~23日焦作市极端暴雨天气过程。发现台风“烟花”、“查帕卡”和副高的对峙,造成了焦作市的连续性暴雨天气过程;台风“烟花”与副热带高压之间位势梯度加大,在925 hPa附近形成东南低空急流为焦作市暴雨提供了充沛的水汽条件;近地面东北风急流的强烈抬升作用及“烟花”之间激发的次级环流是焦作市极端暴雨产生的主要原因。Analysis of extreme heavy rainfall in Jiaozuo city from July 18th to 23rd 2021, using conventional meteorological data and NCEP (1˚ × 1˚) 6-hourly grid data, revealed that the confrontation between Typhoon “In-Fa”, Typhoon “Cempaka” and the subtropical high-pressure system caused a prolonged period of rainfall in Jiaozuo City. The intensified potential gradient between Typhoon “In-Fa” and the subtropical high-pressure system created a strong southeast low-level jet near 925 hPa, providing abundant moisture for heavy rainfall in Jiaozuo City. The strong lifting effect of the near-surface northeast wind jet and the secondary circulation induced by the interaction between Typhoon “In-Fa” and the subtropical high-pressure system were the main factors contributing to the occurrence of extreme heavy rainfall in Jiaozuo City.

关 键 词：极端暴雨 连续性暴雨 台风“烟花” 副热带高压 次级环流 

分 类 号：P45[天文地球—大气科学及气象学]