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气象:2018,44(5):665-675
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S波段WSR-88D双偏振雷达观测非降水回波识别方法研究
张林,杨洪平
(中国气象局气象探测中心,北京 100081)
Non-Precipitation Identification Technique on S-Band WSR-88D Polarization Weather Radar
ZHANG Lin,YANG Hongping
(Meteorological Observation Centre, CMA, Beijing 100081)
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投稿时间:2016-10-24    修订日期:2017-11-29
中文摘要: 与新一代天气雷达相比,双偏振雷达能发射水平和垂直极化偏振波,具有更多的测量信息,利于区分降水和非降水回波,在雷达定量估测降水中发挥着重要作用。本文根据双偏振雷达的测量变量(水平反射率、差分反射率和相关系数)及降水与非降水回波的结构特征,发展了一套S波段双偏振雷达数据质量控制算法,重点研究晴空回波和生物回波的识别。利用上海南汇WSR-88D偏振雷达的观测数据做测试和评估,评估结果表明该算法对南汇偏振雷达非降水回波识别准确率达93%以上,且对降水回波的误判率仅为3.82%。
Abstract:In contrast to the new generation weather radar, dual-polarization weather radar can transmit both of horizontal and vertical electromagnetic waves, and collect more information to differentiate between precipitation and non-precipitation radar echoes. Identifying and removing non-precipitation echoes in radar reflectivity fields are one critical step in radar-based quantitative precipitation estimation. In this paper, according to the observed variables and characteristics of non-precipitation, an algorithm of quality control for S-band polarization weather radar data is developed, tested and evaluated by employing the WSR-88D polarization weather radar in Shanghai. The results demonstrate that the algorithm could identify more than 93% non-precipitation, and the precipitation echo error is only 3.82%.
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基金项目:公益性行业(气象)科研专项(GYHY201506021)资助
引用文本:
张林,杨洪平,2018.S波段WSR-88D双偏振雷达观测非降水回波识别方法研究[J].气象,44(5):665-675.
ZHANG Lin,YANG Hongping,2018.Non-Precipitation Identification Technique on S-Band WSR-88D Polarization Weather Radar[J].Meteor Mon,44(5):665-675.