| 摘要: |
| 利用2016-2019年贵州省人工影响天气作业站点上报信息、市（州）的灾情快报，以及毕节、贵阳、兴义3部新一代多普勒天气雷达资料等，分析贵州中西部7个具有多阶跃增特征的雹云单体的雷达参数演变特征，研究发现：（1）二阶跃增冰雹云演变呈发展-跃增-降雹-减弱-再发展-跃增-降雹的趋势；（2）降雹时刻，雹云的最大反射率因子（MaxREF）、45dBz回波高度（H45dBz）、回波顶高（H0dBz）、垂直累积液态水含量（VIL）平均值分别为63.4 dBz、7.55km、12.01km、39.08 kg/m2；大冰雹对应的MaxREF和VIL较小冰雹更大，大冰雹、小冰雹的H45dBz差别不大，大冰雹对应的H0dBz反而小于小冰雹；（3）冰雹发生前，MaxREF、H45dBz、H0dBz和VIL两个体扫间平均最大跃变分别为：5.89 dBz、2.19km、2.82km、17.5 kg/m2，跃变现象的出现比冰雹发生时刻平均提前21.4、22.2、28、28.8min，可以作为冰雹发生前的重要判断依据。 |
| 关键词: 雹云单体；雷达参数演变；跃增特性 |
| DOI： |
| 投稿时间：2022-10-29修订日期：2023-02-22 |
| 基金项目:中国气象局云雾物理环境重点开放实验室开放课题（批准号：2020Z007） |
|
| Analysis of transition characteristics of hail cloud in central and western Guizhou based on radar observation |
| lihao,ZOU Shuping |
| (Weather Modification Office of Guizhou Province) |
| Abstract: |
| Various parameters are inversed in the process of single hail cloud development by using 3 Doppler weather radar data and hail information, and the relationship between various parameters and occurrence of hailstorms is extracted With 7 single hailstorm cases during 2016-2019 in the central and western Guizhou Province.Results show that: (1)The evolution of the second-order jump hail cloud showed a trend of development-jump increase-hail falling-attenuation-redevelopment-jump increase-hail; (2)The averages of maximum radar base reflectivity(MaxREF),the height of 45dBz(H45dBz)and top of storm(H0dBz),vertically integrated liquid(VIL) are 63.4 dBz、7.55km、12.01km、39.08 kg/m2; (3) During the occurrence of hail, the sudden- increase phenomenon of MaxREF、H45dBz、H0dBz and VIL between the two volume scan are 5.89 dBz、2.19km、2.82km、17.5 kg/m2 on average.This transition occurred 21.4、22.2、28 and 28.8 min earlier than the average time of hailstorm occurrence.Such phenomenon could be an important criterion of hail warning. |
| Key words: Hail; Doppler weather radar parameters ; transition characteristics |
