江门地区一次冰雹过程的分析  

Analysis of a Hail Process in the Area of Jiangmen

作　　者：苏耀墀 黄晓东[1] 

机构地区：[1]江门市气象局,广东江门529000

出　　处：《广东气象》2017年第1期35-39,共5页Guangdong Meteorology

摘　　要：利用常规气象资料、新一代天气雷达资料对一次冰雹天气过程中2个强风暴单体的形势背景、强对流发生条件、强风暴单体演变及结构特征进行了分析。结果表明:该次冰雹过程属前汛期强对流天气类型的复合型;强垂直风切变条件下,上干下湿有利于冰雹的产生;对流有效位能(CAPE)、K指数、SI指数能够很好地预示强对流天气的发生;该次过程中强对流风暴表现为由右移超级单体和左移超级单体组合而成的复合体;垂直累积液态含水量(VIL)>65 kg/m2有利于冰雹的产生;S波段雷达出现中气旋特征时应关注冰雹的产生。With conventional meteorological data and next-generation weather radar data, we studied the background situation, generating conditions for severe convection, the evolution of severe storm cells and their structural features during a process of hail weather. The result is shown as follows. The hail was of a complex type of severe convection weather during the annually first raining season. With intense vertical wind shear, the hail was in good condition to generate as it was in an environment of being wetter in the lower level than in the upper level. Indicators such as convective availability potential energy （ CAPE）, K index and SI index well pointed to the occurrence of the severe convection weather. During the process, the severe storm presented itself as a complex body that combined a right-moving supercell with a left-moving supercell, the vertically integrated liquid （VIL） water content was greater than 65 kg/m^2, which was favorable for the genesis of hails and the occurrence of meso-cyelone in the S-band radar echo indicated a possibility of hails.

关 键 词：天气学 冰雹 强风暴单体 垂直累积液态含水量 弱回波区 中气旋 江门 

分 类 号：P458[天文地球—大气科学及气象学]