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气象:2011,37(10):1228-1232
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X波段双线偏振雷达冰雹识别初步研究
(1.中国科学院大气物理研究所中层大气与全球环境探测开放实验室,北京 100029;2.中国科学院研究生院,北京 100049;3.北京市气象局 ,北京 100089;4.北京市人工影响天气办公室,北京 100089)
Preliminary Research on Method of Hail Detection with X Band Dual Linear Polarization Radar
(1.Institute of Atmospheric Seiences, CAS, Beijing 100029;2.Graduate School, CAS, Beijing 100049;3.Beijing Meteorological Service, Beijing 100089;4.Beijing Weather Modification Office, Beijing 100089)
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投稿时间:2010-08-04    修订日期:2011-05-24
中文摘要: 利用北京市人工影响天气办公室X波段双线偏振雷达2009年4—10月观测的不同降雨类型的资料,统计出下雨天ZH-ZDR的分布特征,给出了ZH-ZDR分布的分段函数表达式,在此基础上定义了X波段双线偏振雷达冰雹识别参量HDR,HDR>0表示有冰雹,HDR<0表示无冰雹,并指出电磁波的衰减会影响HDR识别冰雹的结果。根据实际降雹情况和识别效果对比,结果表明HDR大于零的区域与地面降雹情况基本对应一致。
Abstract:Based on the Beijing Weather Modification Office X band dual polarization radar’s observations of different types of rainfall in April to October 2009, the characteristics of raindrop size distribution of ZH-ZDR are given out, and can be expressed as a piecewise function, from which the hail parameters HDR are derived. If HDR>0, then there is hail, and if HDR<0, it means no hail. It is also pointed that the attenuation of electromagnetic waves can affect the results of HDR hail identification. By comparing the relations between HDR and the ground observation hail data, the preliminary results have shown that the HDR above zero region is in good agreement with hail on the ground.
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基金项目:国家自然科学基金项目(40930949)和北京市气象局项目(2010BMBKYZX03)共同资助
引用文本:
苏德斌,马建立,张蔷,吕达仁,2011.X波段双线偏振雷达冰雹识别初步研究[J].气象,37(10):1228-1232.
Su Debi,Ma Jianli,Zhang Qiang,Lv Daren,2011.Preliminary Research on Method of Hail Detection with X Band Dual Linear Polarization Radar[J].Meteor Mon,37(10):1228-1232.