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气象:2018,44(7):944-951
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基于雷达资料的上海地区暴雨面雨量计算及应用
贺芳芳,徐卫忠,周坤,穆海振
(上海市气候中心,上海 200030)
Compution and Application of Rainstorm Surface Rainfall Based on Radar Data in Shanghai
HE Fangfang,XU Weizhong,ZHOU Kun,MU Haizhen
(Shanghai Climate Center, Shanghai 200030)
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投稿时间:2017-09-21    修订日期:2018-04-28
中文摘要: 根据上海地区小时雷达资料的定量降水估测(quantitative precipitation estimation,QPE)网格产品和经过质量控制的自动站雨量资料进行暴雨面雨量计算方法研究,计算方法为:将暴雨区内自动站周围9个网格点的QPE平均值作为自动站的雷达估测雨量,计算各测站雨量与雷达估测雨量的差值,用克里金插值方法将差值场插值到雷达降水估算产品相同的网格点上,再将网格点上残差插值数据加上网格点上雷达估测雨量,得到各网格点用自动站订正后的雷达估测小时雨量资料。文中24个典型暴雨各测站订正后QPE与实测雨量的平均绝对误差比订正前减小了27%;两个典型暴雨主要降水阶段经国家气象站资料订正后QPE与实测雨量的平均误差比订正前减小了33%~39%,暴雨过程总雨量经国家气象站资料订正后减小了34%~59%。根据以上方法得到的网格点雨量计算和绘制上海地区2007—2015年24个典型暴雨降水区域的小时面雨量值和图、过程面雨量值和图、行政区和水利片面雨量值和图。最后基于.NET Framework 4.0基础架构软件开发平台,使用Microsoft Visual Studio 2012和Microsoft Visual Studio软件开发工具制作“基于雷达资料暴雨面雨量自动化计算查询系统”,供业务科研人员实时查询和计算。
Abstract:The computing method of rainstorm surface rainfall is studied based on the grid product of hourly quantitative precipitation estimation (QPE) of radar data and the automatic weather station (AWS) quality control rainfall data in Shanghai. The computing method is that the radar estimated rainfall of the AWS in rainstorm area, which was obtained from the radar QPE mean of 9 grid points around the AWS, is used to calculate the difference between the rainfall and the radar estimated rainfall of the AWS. The difference field is interpolated into the same grid point of radar precipitation estimation using Kriging interpolation method. The hourly rainfall of grid points is the sum of the residual interpolation data and the radar rainfall estimation of grid points. The average absolute error of QPE and measured rainfall of 24 typical rainstorm cases of all stations is reduced by 27% after correction. The average error of QPE and measured rainfall of main precipitation sections and process rainfall of national weather stations for two typical rainstorms are reduced by 33%-39% and 34%-59% respectively after correction. The value and graph of hourly and process surface rainfall and administrative district as well as water conservancy one sided rainfall of the 24 typical rainstorms from 2007 to 2015 are calculated and drawn according to the rainfall of grid points using above computing method. Finally, the automated computing inquiry system of rainstorm surface rainfall based on radar data is produced using the development tools of Visual Studio Microsoft 2012 and Microsoft Visual Studio software relying on NET Framework.4.0 Software development platform. This system will be used for realtime querying and calculation.
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基金项目:公益性行业(气象)科研专项(GYHY201506014)和上海市气象局研究性专项(YJ201508)共同资助
引用文本:
贺芳芳,徐卫忠,周坤,穆海振,2018.基于雷达资料的上海地区暴雨面雨量计算及应用[J].气象,44(7):944-951.
HE Fangfang,XU Weizhong,ZHOU Kun,MU Haizhen,2018.Compution and Application of Rainstorm Surface Rainfall Based on Radar Data in Shanghai[J].Meteor Mon,44(7):944-951.