| 摘要: |
| 利用梵净山周边区域自动站逐小时降水资料和铜仁雷达观测资料,对2017—2018年铜仁市梵净山周边区域暴雨过程中逐小时分级降水的雷达类型和回波特征进行分析。结果表明:①梵净山区域暴雨过程中小雨、中雨、大雨年均总站次的日变化均呈双峰型分布，而暴雨年均总站次呈单锋型，并且具有明显的夜雨特征。②造成梵净山区域暴雨天气的雷达回波类型可分为本地发展型、移入型和合并加强型3种。③小时雨强与回波强度呈正相关，而与移动速度呈反相关。④径向速度图上中雨量级降水有弱辐合特征，大雨量级降水出现弱的逆风区结构，暴雨量级降水有明显的辐合辐散和速度对特征，且存在逆风区结构，逆风区位置对应强回波中心。⑤垂直累计液态水含量大值区及回波顶高度与反射率因子大值区有较好的对应。 |
| 关键词: 梵净山区域；小时降水；时空分布；回波特征 |
| DOI： |
| 投稿时间：2021-07-19 |
| 基金项目:贵州省气象局科研业务项目（黔气科登[2019]09-04号）：梵净山区域降水短临预报方法及气象服务的初探；贵州省科技厅项目（黔科合基础[2018]1158）：基于气候变化的梵净山水资源响应事实分析；铜仁市短临预报预警研究团队；铜仁市科技局项目（铜市科研[2020]23号）：冬季凝冻天气对铜仁市交通影响分析研究 |
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| Analysis on the Radar Echo Characteristics of Hourly Precipitation in the RainstormProcess around Fanjing Mountain |
| HU Ping,XIA Yang,CAI Chengyao,CHEN Jun,DU Xiaoling |
| (Tongren Meteorological Bureau of Guizhou Province, Tongren 554300 , China;Liupanshui Meteorological Bureau of Guizhou Province, Liupanshui 553000 , China;Yanhe Meteorological Bureau of Guizhou Province, Yanhe 565300 , China;Guizhou Meteorological Observatory, Guiyang 550002 , China) |
| Abstract: |
| Based on the stations data of hourly precipitation around Fanjing Mountain and radar data of Tongren, the types and characteristics of radar echo about the hourly graded precipitation in the rainstorm around Fanjing Mountain in Tongren during 2017—2018 are analyzed. The results show that: ①In the rainstorm process around Fanjing Mountain, the daily variation of annual total stations of light rain, moderate rain and heavy rain is bimodal, while rainstorm which has obvious characteristics of night rain is single front; ② The radar echo types that cause rainstorm can be divided into three types: local development type, migration type and combined enhancement type; ③ Hourly rain intensity is positively correlated with echo intensity, but inversely with moving speed. ④ The moderate rain has weak convergence characteristics on the radial velocity, while heavy rain has also weak upwind zone structure and obvious velocity pair characteristics. At this time, the location of the upwind zone corresponds to the strong echo center. ⑤ The area of high VIL and ET is correlated well to the area of high reflectivity factor. |
| Key words: Fanjing Mountain； hourly precipitation； temporal and spatial distribution； echo characteristics |
