| 宜丰短时强降水雷达回波特征分析 |
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| 引用本文： | 马中元,罗 燕,辛玮琦,徐瑾薇,洪丽霞,范小军.宜丰短时强降水雷达回波特征分析[J].新疆气象,2021,15(2):70-80. |
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| 作者姓名： | 马中元 罗 燕 辛玮琦 徐瑾薇 洪丽霞 范小军 |
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| 作者单位： | 江西省气象科学研究所,宜丰县气象局,宜丰县气象局,宜丰县气象局,宜丰县气象局,宜丰县气象局 |
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| 基金项目： | 中国科学院战略性先导科技专项(A类-XDA19040202)、国家自然科学基金面上项目“粤桂汛期暖区暴雨的触发机理及对比研究”(41675045)、国家自然科学基金面上项目“江南地区暖区暴雨对流触发机制及组织结构研究”(41975001)、中国气象科学研究院开放课题(2012LASWB01)、南京雷达气象与强天气开放基金(BJG201205)资助.第一作者：黎辉文(1968-),女,大学,工程师,从事气象综合业务与业务管理. 邮箱：274246271@qq.com通讯作者：马中元(1954-),男,大学,高级工程师.从事短临天气预报技术研究.邮箱：mazhongyuan1@163.com |
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| 摘 要： | 使用江西自动站数据、MICAPS天气图资料、雷达拼图CR产品和单部雷达基数据等资料,采用统计分析、形态对比、特征提取等方法,对2017—2019年宜丰4次暴雨和大暴雨过程中的短时强降水天气的演变与回波特征进行分析,结果表明:(1)宜丰暴雨或大暴雨过程都出现了≥30 mm·h-1的短时强降水。(2)200 hPa赣北处辐散分流区中,500 hPa 588 dagpm线稳定维持在江西南部,赣北处于850 hPa西南急流的左侧及前端,形成上干下暖湿的不稳定层结;地面辐合线是短时强降水的主要触发系统。(3)在短时强降水期间,雷暴回波群中超级单体回波强度为60~65 dBZ,短带回波强度为50~55 dBZ,复合体回波强度为55~60 dBZ,絮状回波带回波强度为40~45 d BZ。(4)在单部雷达回波产品上,雷暴回波群、回波短带、复合单体回波和絮带状回波,组合反射率CR为40~65 d BZ,回波顶高ET为8~15 km,垂直液态水含量VIL为10~60 kg/m2,50 dBZ强回波顶高为5~12 km。
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| 关 键 词： | 宜丰 暴雨 短时强降水 天气系统 回波特征 |
| 收稿时间： | 2019/11/18 0:00:00 |
| 修稿时间： | 2019/12/24 0:00:00 |
Analysis of Short-term Heavy Precipitation Weather and Radar Echo Characteristics in Yifeng |
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| XIN Weiqi,MA Zhongyuan,CHEN Yun,LUO Yan,LI Huiwen,HONG Lixia.Analysis of Short-term Heavy Precipitation Weather and Radar Echo Characteristics in Yifeng[J].Bimonthly of Xinjiang Meteorology,2021,15(2):70-80. |
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| Authors: | XIN Weiqi MA Zhongyuan CHEN Yun LUO Yan LI Huiwen HONG Lixia |
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| Institution: | (Jiangxi Institute of Meteorological Sciences,Nanchang 330046,China;Yifeng Meteorological Bureau,Yifeng 336300,China;National Meteorological Centre,Beijing 100081,China) |
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| Abstract: | Using Jiangxi automatic station data,MICAPS weather map data,radar jigsaw CR products and single radar-based data,the evolution and echo characteristics of short-term heavy precipitation during four rainstorms and heavy rain process in Yifeng from 2017 to 2019 were analyzed by means of statistical analysis,morphological comparison and feature extraction.The results show that:(1)Shortterm heavy precipitation occurred in Yifeng rainstorm or heavy rainstorm process.(2)In the divergence and distributary area at 200 hPa in northern Jiangxi,the 500 hPa 588 dagpm line is stably maintained in the south of Jiangxi,and northern Jiangxi is at the left and front end of the southwest jet at 850 hPa,forming unstable stratification with upper dryness and lower warmth and humidity;Ground convergence line is the main trigger system of short-term heavy rainfall.(3)During short-term heavy precipitation,the echo intensity of supercell in thunderstorm echo group is 60-65 dBZ;The intensity of short band wave is 50-55 d BZ;The echo intensity of complex is 55-60 dBZ;The echo intensity of floc echo is 40-45 dBZ.(4)On a single radar echo product,the combined reflectivity CR of thunderstorm echo group,echo short band,composite monomer echo and floc echo is 40-65 dBZ,the echo top height ET is 8-15 km,the vertical liquid water content VIL is 10-60 kg/m2,and the 50 dBZ strong echo top height is 5-12 km. |
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| Keywords: | Yifeng rainstorm Short-term heavy rainfall Weather system Cloud image features Echo characteristics numerical forecasting |
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