青藏高原东北部HDA算法检验评估及参数本地化  

Evaluation of Hail Detection Algorithm and Localization of Hail Parameters in Northeastern Tibetan Plateau

作　　者：朱平[1] 李生辰[1] 

机构地区：[1]青海省气象台,西宁810001

出　　处：《气象科技》2013年第2期300-306,共7页Meteorological Science and Technology

基　　金：青海省科技厅项目"青海省短时强降水预报预警方法研究"(2011-Z-712)资助

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。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.

关 键 词：冰雹探测 HDA 效果检验 参数本地化 

分 类 号：P481[天文地球—大气科学及气象学]