【摘要】 利用2006—2011年CINRAD/CD雷达在青藏高原东北部(以下简称高原)探测到的110次强对流风暴过程,运用WSR-88D冰雹探测算法(HDA)计算强冰雹指数(SHI)和最大预期冰雹直径(MEHS)并进行探测效果检验。提出对HDA原默认参数进行本地化并给出本地化方案,明显地改善了探测效果,正确率由85%提高到89%,虚警率由41%降低到21%,临界成功指数由53%升高到75%,MEHS大于观测尺寸的百分比由74%降到33%。结果对CINRAD/CD雷达探测冰雹有重要参考价值。更多还原

【Abstract】 An enhanced WSR-88D hail detection algorithm(HDA) is used for its performance evaluation in 110 sever convective weather processes.From 2006 to 2011,this method was used to detect the extreme weather with CINRAD/CD radar data in the northeastern Tibetan Plateau,including the calculation of Sever Hail Index(SHI) and the Maximum Evaluation Hail Size(MEHS).The localization of the default hail parameters is conducted.The result shows that the detection performance is evidently improved;POD(Probability Of Detection) increases from 85% to 89%;FAR(False Alarm Ratio) reduces from 41% to 21%;CSI(Critical Success Index) raises from 53% to 75%;MEHS(Expected Maximum Hail Size) drops from 74%to 33%,which is bigger than the actual maximum hail size.The results are useful to the hail detection with CINRAD/CD radar in nowcasting service.更多还原