文献类型：期刊文献

中文题名：河南郑州“7?20”极端暴雨成因分析

英文题名：Causes analysis of extreme rainstorm in Zhengzhou of Henan Province on July 20,2021

作者：彭玮怡[1];薛宇峰[1];刘春雷[1]

机构：[1]广东海洋大学海洋与气象学院,广东湛江524088

年份：2022

卷号：43

期号：12

起止页码：8

中文期刊名：水利水电快报

外文期刊名：Express Water Resources & Hydropower Information

基金：国家重点研发计划项目(2018YFC1506902);2021年广东省质量工程项目(010203032201);2021年校教改项目(010201032101);2022年省级教改项目(010201032207)

语种：中文

中文关键词：郑州“7?20”极端暴雨;低涡;湿位涡;大气环流;中尺度系统;台风“烟花”

外文关键词：extreme rainstorm in Zhengzhou on July 20,2021;low vortex;moist potential vorticity;general atmospheric circulation;mesoscale system;typhoon"IN-FA"

中文摘要：2021年7月20日,河南郑州发生了罕见的极端暴雨事件。为了解此次极端暴雨的成因,提高极端暴雨天气的预报准确率,利用河南省气象站降水资料、GPM降水资料、ERA5再分析资料和FY2F亮温资料对此次暴雨过程进行了综合分析。结果表明:河南处在“西低东高”环流背景下,高低空分别受到高压脊、异常偏强的副高与台风“烟花”、低涡、黄淮气旋等多尺度天气系统的综合影响。“烟花”与副高相互作用增强了东南气流及其水汽输送,在低涡、黄淮气旋和喇叭口地形作用下形成强烈辐合,多个近似圆形、200 km左右的β中尺度系统加强发展与豫南多个γ-β新生对流单体的合并加强是导致此次暴雨的直接原因。暴雨时段对应正压项MPV1和MPV2均为负值中心,湿位涡、相当位温及中低层能量锋汇集区域可对局地暴雨的预报提供一定的参考。

外文摘要：On July 20,2021,a rare extreme rainstorm event occurred in Zhengzhou City of Henan Province.In order to understand the causes of this rainstorm weather process and improve the forecasting accuracy of extreme rainstorm,the precipitation data of meteorological stations in Henan Province,GPM precipitation data,ERA5 reanalysis data and FY2F brightness temperature data were used to comprehensively analyze the extreme rainstorm process in Zhengzhou.The results showed that under the background of the circulation situation of"low in the west and high in the east"in Henan Province,the high and low altitudes were respectively affected by high-pressure ridges,the combination of abnormally strong subtropical high and typhoon"IN-FA",low vortex,Huanghuai cyclone and other multi-scale weather systems.The interaction between"IN-FA"and the subtropical high enhanced the southeast air stream and its water vapor transport,strong convergence was formed under the action of low vortex,Huanghuai cyclone and the topography of horn mouth.The merger and development of several approximately circular β mesoscale systems with a horizontal scale of 200 km and the merger and strengthening of multiple γ-β new convective cells in southern Henan were the direct causes of the extreme rainstorm.The moist potential vorticity barotropic MPV1 and MPV2 were in the center of negative values during the heavy rain period in Zhengzhou.The moist potential vorticity,the equivalent potential temperature and the energy fronts in the middle and low layers has indications for the forecast of local heavy rain.