CINRAD/SA雷达强冰雹识别算法的应用检验  

Application and test of severe hail detection algorithm based on CINRAD/SA radar

作　　者：周金莲[1] 钟敏[1] 吴翠红[1] 杨洪平[2] 张家国[1] 

机构地区：[1]武汉中心气象台,武汉430074 [2]中国气象局气象探测中心,北京100081

出　　处：《暴雨灾害》2012年第4期373-378,共6页Torrential Rain and Disasters

基　　金：公益性行业(气象)科研专项(GYHY200906003);湖北省气象局科技发展基金项目(2012Z05)

摘　　要：为更好地应用HDA算法产品并为进一步优化冰雹识别算法提供参考,应用2004—2010年武汉雷达和2007—2008年济南、青岛、烟台、宜昌、郑州和重庆共7部雷达监测到的28个直径大于等于19 mm的致灾性强冰雹天气个例,对CINRAD/SA雷达的强冰雹识别及最大冰雹直径(MEHS)预测产品进行了检验分析,同时对我国北方(济南、青岛、烟台、郑州)雷达和南方(武汉、宜昌、重庆)雷达的冰雹识别及大小预测效果进行了对比。结果表明:1)在不订正0℃层和-20℃层高度时,该算法对强冰雹天气的识别效果较好,但对MEHS的预测效果较差。2)每个雷达站对强冰雹识别和MEHS预测的效果差别不大,南方雷达和北方雷达对强冰雹的识别效果相近,但南方雷达对MEHS的预测效果较好。3)强冰雹识别和MEHS预测在5月份效果最好,8月份最差;该算法对大冰雹的识别效果较好,但仅对直径为40～49 mm的冰雹直径预测效果较好。4)冰雹识别产品对强冰雹的识别效果随所识别冰雹概率(POSH)增大而增强,当POSH=100时,临界成功指数CSI为100%,发生冰雹天气的可能性非常大。With 28 severe hail weather（diameter of hail greater than or equal to 19 mm） detected by 7 radar stations including Wuhan radar station from 2004 to 2010 and Jinan,Qingdao,Yantai,Yichang,Zhengzhou and Chongqing radar stations from 2007 to 2008 the products of hail identification（HI） including the probability of severe hail（POSH） and the maximum expected hail size（MEHS） were tested and analyzed in order to use better the hail detection algorithm（HDA） products and optimize further the hail detection algorithm.At the same time the test results getting from the radar stations in the north area（Jinan,Qingdao,Yantai and Zhengzhou） were contrasted with that getting from the radar stations in the south area（Wuhan,Yichang and Chongqing）.The results show as follows.The HDA algorithm had a better effect on severe hail identification and worse effect on MEHS without height correction of 0℃ and-20℃.There was few difference of the effect on hail identification and MEHS among all the radar stations The hail identification effect of the radar stations in the south area was close to that of the radar stations in the north area,and the MEHS effect of the radar stations in the south area was better than that of the radar stations in the north area.The HDA algorithm had the best effect in May and the worst effect in August.The HDA algorithm had a better effect on detection of bigger hails and a better prediction of hails having the diameters of 40 mm to 49 mm.The identification effect on sever hail was strengthened as the value of POSH increased.When the value of POSH was 100 and the CSI was 100%,there would be a big possibility of catastrophic severe hail weather.

关 键 词：强冰雹识别概率 强冰雹指数 最大冰雹直径 临界成功指数 

分 类 号：TN959.4[电子电信—信号与信息处理]