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气象:2010,36(4):90-95
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新一代天气雷达定量降水估测集成系统
(1.北京大学大气科学系, 北京 100871 ;2.中国气象局气象探测中心, 北京 100081;3.厦门市气象局, 厦门 361012;4.南京大学大气科学系, 南京 210093;5.安徽省气象局, 合肥 230031)
CINRAD Radar Quantitative Precipitation Estimation Group System
(1.Department of Atmospheric Sciences, Peking University, Beijing 100871;2.Meteorological Observation Center, China Meteorological Administration, Beijing 100081;3.Xiamen Meteorological Bureau, Xiamen 361012;4.Department of Atmospheric Sciences, Nanjing University, Nanjing 210093;5.Anhui Meteorological Bureau, Hefei 230031)
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投稿时间:2008-10-22    修订日期:2009-12-09
中文摘要: 降水的定量测量是天气雷达的重要应用之一,新一代天气雷达定量降水估测集成系统(QPEGS)是一套基于新一代天气雷达的雷达雨量计联合估测降水软件,利用多种雨量计校准雷达降水的方法,生成1小时降水分布。其产品的时间分辨率达10分钟,空间分辨率1 km×1 km,适合省市级业务台站使用。过去3年的数据评估表明:校准雨量计数量和估测精度有明显正相关,校准雨量计数越多,降水估测精度越高,2003年的小时降水估测误差约40%,过程降水量的估测误差小于20%;雨量计密度保持不变的情况下,降水时段越长,降水区域越大,降水估测的精度也越高。
Abstract:A radar quantitative precipitation estimation group system is described in this paper which is established based on rain gauge adjustment techniques and is aimed to apply to meteorological operations. It provides hourly precipitation field in 10 minute interval and 1 km×1 km spacial resolution. Evaluation results by use of the data in the past three years show that the more the adjustment rain gauges, the higher the estimated precipitation accuracy. The relative error of hourly estimation during the year 2003 is about 40%, and even lower than 20% for the total precipitation in a precipitation event. The longer and larger the rain event lasts and covers, the higher the accuracy as well if the density of rain gauge station keeps fixed.
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基金项目:中国气象局新一代天气雷达业务建设软件系统开发项目资助
引用文本:
刘晓阳,杨洪平,李建通,李柏,赵坤,郑媛媛,2010.新一代天气雷达定量降水估测集成系统[J].气象,36(4):90-95.
LIU Xiaoyang,YANG Hongping,LI Jiantong,LI Bai,ZHAO Kun,ZHENG Yuanyuan,2010.CINRAD Radar Quantitative Precipitation Estimation Group System[J].Meteor Mon,36(4):90-95.