文章摘要
2020年6月1日山东强雹暴过程双偏振雷达观测分析
Polarimetric radar observational analysis of a severe hailstormon 1 June 2020 in Shandong province
投稿时间:2021-06-18  修订日期:2021-08-29
DOI:
中文关键词: 雹暴  双偏振特征  观测分析  冰雹预警
英文关键词: hailstorm  dual polarization characteristics  observational analysis  hail warning
基金项目:国家重点研发计划项目(2018YFC1507903),中国气象局云雾物理环境重点开放实验室开放课题(2020Z00711)
作者单位邮编
龚佃利 山东省气象科学研究所 250031
朱君鉴 山东省气象台 250031
王俊 山东省气象科学研究所 250031
陈滔 蒙阴县气象局 276200
于成龙 蒙阴县气象局 276200
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中文摘要:
   利用济南S波段双偏振多普勒雷达探测数据,结合探空、地面气象站观测和实地冰雹调查资料,对2020年6月1日影响山东中西部的一次强雹暴过程进行分析。结果表明:1)本次雹暴过程受高空槽影响,于当日中午在河北邢台市初生,移入山东境内后持续降雹近5 h,其中17:00后雹暴明显加强,冰雹灾害严重。2)典型降雹时次具有明显的三体散射特征;1.5~5.5 km高度冰雹区对应的反射率因子(ZH)均大于65 dBZ,差分反射率因子(ZDR)介于-2.6~1.5 dB,相关系数(CC)介于0.8~0.96;大冰雹多集中在低层前侧入流的左侧和前侧。3)多个单体于17:00前后演变成超级单体风暴,具有明显的有界弱回波区(BWER)和中气旋结构,ZDR柱可指示雹暴主上升气流区的位置。4)水凝物相态分类产品(HCL)给出的冰雹分布反映了空中冰雹的分布和演变,可从冰雹色标面积大小、连续性程度预估冰雹强弱,根据低仰角的冰雹色标预判冰雹落区。
英文摘要:
   Using observation data from Jinan S-band dual polarization Doppler weather radar,sounding,surface meteorological stations, and hail informations obtained from field surveys,a severe hailstorm occurred on 1 June 2020 in Shandong province is analyzed. The results are shown blow.1) Affected by the altitude trough, the hailstorm occurred in Xingtai city in Hebei province at noon on June 1,after moving into Shandong province,the hailstorm continuous impact nearly 5 h,after 17:00 BST,the hailstorm strengthened significantly and the hail disaster was severe.2)The hailstorm had typical characteristic of Three-Body Scatter Spike(TBSS) at typical time of the hail-falling, corresponding horizontal reflectivity factor (ZH) to the hail area at altitude from 1.5 to 5.5 km were greater than 65 dBZ,and differential reflectivity (ZDR) values were mostly between -2.6~1.5 dB,correlation coefficient(CC) were mostly between 0.8~0.96,the large hail appeared on the front and left side of the bottom front inflow.3)About at 17:00 BST,multi-cell storms became supercell storm, the Bounded Weak Echo Region (BWER) and mesocyclone structures of the hailstorm could be observed, ZDR column could effectively indicate the position of the main updraft.4)The hydrometeor phase classification products(HCL)had a good indication effect on the distribution and evolution of hail in the hailstorm,the strength of hail could be estimated from the size, continuity and compactness of the hail color marker area, and the hail-falling area can be prejudged according to the hail color marker at the low elevation.
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