• CN 62-1175/P
• ISSN 1006-7639
• 双月刊
• 中国科技核心期刊
• 中国学术期刊综合评价数据库统计源期刊
• 中文科技期刊数据库收录期刊

• 论文 •

### 豫北两次特大暴雨事件的物理量极端性和中尺度特征王君

王君1,2

1. 1.河南省气象学会，河南郑州450003；2.河南省气象科学研究所，河南郑州450003
• 出版日期:2019-06-28 发布日期:2019-07-01
• 作者简介:王君(1974— )，女，河南淅川人，高级工程师，主要从事应用气象研究. E-mail: 1004937925@qq.com。
• 基金资助:
河南省科技攻关项目（172102310463）、国家自然科学基金项目（91637105，41475041）及中国气象局预报员专项（CMAYBY2017-045）共同资助

### Analysis of Extremity and Mesoscale Characteristic on Two Torrential Rain Processes in North He’nan Province

WANG Jun 1,2

1. 1. He’nan Provincial Meteorological Society，Zhengzhou 450003, China；
2. He’nan Institute of Meteorological Sciences, Zhengzhou 450003, China
• Online:2019-06-28 Published:2019-07-01

Abstract: Two rare torrential rain processes occurred in north He’nan Province on July 9 and 19, 2016, which caused severe effect and property losses on the life of people and various industries. Based on precipitation data from automatic weather stations, radar composite reflectivity and base reflectivity, conventional radiosonde and surface observation data and reanalysis data from European Centre for Medium-Range Weather Forecasts (ERA-Interim), the precipitation characteristics, extremity of water vapor and dynamic conditions, relation between topography and precipitation and characteristic of mesoscale convective system were analyzed. Results show that: (1) There was large daily rainfall that created new history record of daily rainfall during the two torrential rain processes, and strong convection characteristics were quite obvious. The heavy rainfall centers were both on the east of the Taihang Mountains, while the influence systems and rainfall range were different. (2) There were two water vapor transports from southwest and southeast from tropics and subtropics, and the total water vapor conditions were good during the two rainfall processes. The total precipitable water of “7.09” rainstorm was obviously extreme, while the vapor condition of “7.19” rainstorm was close to the average value during heavy rainfall processes at the same period and the extremity was not obvious. (3) The dynamic conditions of two torrential rains were quite different. The dynamic condition of “7.09” rainstorm was weak, and the 700 hPa vertical velocity over Xinxiang station (the heavy rainfall center) was much lower than the multi-year average value during heavy rainfall processes in July. For” 7.19” rainstorm, the 700 hPa vertical velocity over Linzhou station (the heavy rainfall center) was 3 times of the multi-year average value during the 28 heavy rainfall processes in July since 1981, which showed that the extremity was quite obvious. (4)The two torrential rain processes were both accompanied by genesis, development and maintenance of surface mesoscale convergence lines, which triggered genesis and merge of the convective units. The enhancement and maintenance of convective units were corresponding to the large hourly rainfall intensity. The convective cloud clusters had the characteristics of low centroid and high efficiency precipitation. (5) The topography of the Taihang Mountains had positive effect on increment of precipitation.

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