对丽水强对流天气过程的中尺度分析和预警启示  

Mesoscale analysis of severe convective weather process in Lishui and its warning

作　　者：周建平 黄克慧 钟建峰 赵放 

机构地区：[1]浙江省丽水市气象局,浙江丽水323000 [2]浙江省温州市气象局,浙江温州325027

出　　处：《气象科学》2009年第2期266-271,共6页Journal of the Meteorological Sciences

摘　　要：通过对强对流过程天气背景、物理量诊断分析,发现西南暖湿气流致使大气增温增湿和能量的积聚,大气处于不稳定状态;利用高频次、高分辨率的新一代天气雷达产品进一步分析,发现雷达基本反射率图像中显现出风暴的"穹窿"和BWER等结构特征;对流单体质心反射率强度、高度和冰雹概率均有陡增的现象。大气中的暧平流、高低空辐散、辐合场相配合导致垂直运动强烈发展并维持,促成了强对流天气过程。By diagnostic analysis of the observational elements during a thunderstorm process, it is found that south-west warm and wet flow with energy aggregation led to instability of the atmosphere. The radar data with higher frequency and fine resolution showed the details of vault and BWER structures of the thunderstorm. The intensity and latitude of reflectivity of center of mass for convective cell as well as hail probability have been found to increase suddenly. Warm air and convergence in low troposphere , divergence in upper troposphere results in strong vertical motion and the thunderstorm.

关 键 词：强对流 对流质心 “穹窿”和BWER 

分 类 号：P457.9[天文地球—大气科学及气象学]