S波段WSR-88D双偏振雷达观测非降水回波识别方法研究
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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%。
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-88 D 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%.
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-88 D 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%.
引文
杜牧云,刘黎平,胡志群,等,2012.双线偏振差分传播相移的质量控制[J].应用气象学报,23(6):711-719.
江源,刘黎平,庄薇,2009.多普勒天气雷达地物回波特征及其识别方法改进[J].应用气象学报,20(2):204-208.
冷亮,黄兴友,杨洪平,等,2012.多普勒雷达晴空回波识别与应用[J].气象科技,40(4):535-540.
李柏,古庆同,李瑞义,等,2013.新一代天气雷达灾害性天气监测能力分析及未来发展[J].气象,39(3):266-280.
李丰,刘黎平,王红艳,等,2012.S波段多普勒天气雷达非降水气象回波识别[J].应用气象学报,23(2):147-158.
刘黎平,吴林林,杨引明,2007.基于模糊逻辑的分步式超折射地物回波识别方法的建立和效果分析[J].气象学报,65(2):252-260.
马中元,朱春巧,刘熙明,等,2010.CINRAD雷达数据质量控制方法初探[J].气象,36(8):134-141.
张林,杨洪平,邓鑫,等,2014.基于模板匹配法的长乐雷达强超折射回波识别[J].气象,40(3):364-372.
Hyangsuk P,Ryzhkov A V,Zrnic D S,et al,2009.The hydrometeor classification algorithm for the polarimetric WSR-88D:description and application to an MCS[J].Wea Forecasting,24:730-748.
Jiang Yuan,Xu Qin,Zhang Pengfei,et al,2013.Using WSR-88Dpolarimetric data to identify bird-contaminated doppler velocities[J].Advances in Meteorology,1-13.
Lakshmanan V,Fritz A,Smith T,et al,2007.An automated technique to quality control radar reflectivity data[J].J Appl Meteor Climatol,46:288-305.
Liu Liping,Hu Zhiqun and Fang Wengui,2010.Calibration and data quality analysis with mobile C-band polarimetric radar[J].Acta Meteor Sin,24:502-509.
Tang Lin,Zhang Jian,Kenneth Howard et al,2014.A physically based precipitation-nonprecipitation radar classifier using polarimetric and environmental data in a real-time national system[J].Wea Forecasting,29:1106-1119.
江源,刘黎平,庄薇,2009.多普勒天气雷达地物回波特征及其识别方法改进[J].应用气象学报,20(2):204-208.
冷亮,黄兴友,杨洪平,等,2012.多普勒雷达晴空回波识别与应用[J].气象科技,40(4):535-540.
李柏,古庆同,李瑞义,等,2013.新一代天气雷达灾害性天气监测能力分析及未来发展[J].气象,39(3):266-280.
李丰,刘黎平,王红艳,等,2012.S波段多普勒天气雷达非降水气象回波识别[J].应用气象学报,23(2):147-158.
刘黎平,吴林林,杨引明,2007.基于模糊逻辑的分步式超折射地物回波识别方法的建立和效果分析[J].气象学报,65(2):252-260.
马中元,朱春巧,刘熙明,等,2010.CINRAD雷达数据质量控制方法初探[J].气象,36(8):134-141.
张林,杨洪平,邓鑫,等,2014.基于模板匹配法的长乐雷达强超折射回波识别[J].气象,40(3):364-372.
Hyangsuk P,Ryzhkov A V,Zrnic D S,et al,2009.The hydrometeor classification algorithm for the polarimetric WSR-88D:description and application to an MCS[J].Wea Forecasting,24:730-748.
Jiang Yuan,Xu Qin,Zhang Pengfei,et al,2013.Using WSR-88Dpolarimetric data to identify bird-contaminated doppler velocities[J].Advances in Meteorology,1-13.
Lakshmanan V,Fritz A,Smith T,et al,2007.An automated technique to quality control radar reflectivity data[J].J Appl Meteor Climatol,46:288-305.
Liu Liping,Hu Zhiqun and Fang Wengui,2010.Calibration and data quality analysis with mobile C-band polarimetric radar[J].Acta Meteor Sin,24:502-509.
Tang Lin,Zhang Jian,Kenneth Howard et al,2014.A physically based precipitation-nonprecipitation radar classifier using polarimetric and environmental data in a real-time national system[J].Wea Forecasting,29:1106-1119.