雷达对冰雹灾害落区的跟踪及鉴定
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摘要
以2018年河北省中南部两次冰雹天气过程为例,探索了利用雷达资料跟踪冰雹灾害路径和影响区域的方法。通过台站观测冰雹与雷达识别冰雹区域的对比分析,发现依据雷达反射率因子、回波顶高、垂直累积液态水含量三个参数能够基本识别"冰雹最有可能发生的路径和影响区域"。对雷达识别区域与农业受灾面积进行分析,得知二者成正比关系,进一步说明可以用雷达识别得到的区域对冰雹灾害进行跟踪和鉴定,为更加科学的冰雹灾害风险评估奠定基础。
Two hail weather processes in central and southern Hebei Province in 2018 are taken as examples to explore the method of tracking hail disaster paths and affected areas using radar data. By means of the comparative analysis of hail observation by stations and hail detection by radar,it is found that the most likely path and affected area of hail can be identified basically by three parameters: radar reflectivity factor( Z),echo top height( ET) and vertically integrated liquid water content( VIL). Through the analysis of radar identification area and agricultural disaster area,it is found that there is a direct relationship between them. It further illustrates that hail disaster can be tracked and identified based on radar identification area,which lays a foundation for more scientific risk assessment for hail disaster.
Two hail weather processes in central and southern Hebei Province in 2018 are taken as examples to explore the method of tracking hail disaster paths and affected areas using radar data. By means of the comparative analysis of hail observation by stations and hail detection by radar,it is found that the most likely path and affected area of hail can be identified basically by three parameters: radar reflectivity factor( Z),echo top height( ET) and vertically integrated liquid water content( VIL). Through the analysis of radar identification area and agricultural disaster area,it is found that there is a direct relationship between them. It further illustrates that hail disaster can be tracked and identified based on radar identification area,which lays a foundation for more scientific risk assessment for hail disaster.
引文
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[12]李向红,唐伍斌,李垂军,等.广西强对流天气的天气形势分析与雷达临近预警[J].灾害学,2009,24(2):46-50.
[2]李崇,吉曹翔,夏传栋,等.沈阳地区强对流天气潜势预报环境参数特征分析[J].气象与环境学报,2016,32(6):43-51.
[3]谌志刚,张羽,刘云香,等.基于天气形势分型的珠江三角洲强对流潜势预报方法[J].气象科技,2017,45(3):460-468.
[4]李冬梅,柳琼,刘婉莉,等.一次春季雹灾的多普勒雷达产品特征分析[J].灾害学,2018,33(3):64-68.
[5]李湘,张腾飞,胡娟,等.云南冰雹灾害的多普勒雷达特征统计及预警指标[J].灾害学,2015,30(3):88-93.
[6]刁秀广,朱君鉴,黄秀韶,等. VIL和VIL密度在冰雹云判据中的应用[J].高原气象,2008,27(5):1131-1139.
[7]王秀玲,郭丽霞,高桂芹.唐山地区冰雹气候特征与雷达回波分析[J].气象,2012,38(3):344-348.
[8]刘晓璐,范思睿,汪俊,等.龙门山脉东麓一次强风暴灾害气象特征分析[J].灾害学,2018,33(1):102-110.
[9]刁秀广,张新华,朱君鉴. CINRAD/SA雷达风暴趋势产品在冰雹和大风预警中的应用[J].气象科技,2009,37(2):230-233.
[10]李德俊,唐仁茂,熊守权,等.强冰雹和短时强降水天气雷达特征及临近预警[J].气象,2011,37(4):474-480.
[11]覃靖,潘海,刘蕾,等.桂北地区强冰雹的雷达临近预警指标分析[J].灾害学,2017,32(2):159-164.
[12]李向红,唐伍斌,李垂军,等.广西强对流天气的天气形势分析与雷达临近预警[J].灾害学,2009,24(2):46-50.