新一代天气雷达海浪回波特征分析和识别方法研究.PDF

doi:10.11676/qxxb2013.074 新一代天气雷达海浪回波特征分析和识别方法研究* 1,2 2 3 谭学 刘黎平 范思睿 1,2 2 3 TAN Xue LIU Liping FAN Sirui 1.成都信息工程学院，四川 成都 610225 2.中国气象科学研究院灾害天气国家重点实验室，北京 100081 3.四川省人工影响天气办公室，四川 成都 610072 1. Chengdu University of Information Technology,Chengdu 610225,China 2. State Key Lab of Severe Weather Chinese Academy of Meteorological Sciences,Beijing 100081,China 3. Weather Modification Office of Sichuan Province,Chengdu 610072,China 2012-07-09 收稿，2013-05-22 改回. 谭学，刘黎平，范思睿． ．新一代天气雷达海浪回波特征分析和识别方法研究．气象学报． 待刊 2013 71 ( ) Tan Xue,Liu Liping,Fan Sirui. 2013. Statistical Characteristics of Sea Clutter and Identification of Sea Clutter with Acta Meteorologica Sinica . （ CINRAD. 71(in press) in Chinese) Abstract Radar echo from sea clutter is an unpredictable event which often contaminates the precipitation measurement and other radar products in coastal areas. According to sea clutter observed by SA Doppler radars in Fuzhou, Wenzhou, it is divided into two kinds by the time when it appears. The first kind of sea clutter with strong strength mainly appears before and after a precipitation process during the period except typhoon. The second kind of sea clutter whose strength is generally weak and uniform only appears close to sea areas of the radar position during a typhoon. The reflectivity, radial velocity, spectrum width of velocity, and their spatial variations for sea clutter and different precipitation are examined to determine the membership functions based sea clutter detection algorithm. For the first kind of sea clutter, considering rarely overlap between sea clutter and precipitation