一次中气旋冰雹天气过程的诊断分析  

Diagnostic Analysis of a Mesocyclone-Indued Hail-Storm Event

作　　者：李文娟[1] 郑国光[1] 朱君鉴[2] 郦敏杰 

机构地区：[1]中国气象科学研究院,北京100081 [2]山东省气象科学研究所,济南250031 [3]浙江省杭州市气象局,杭州310008

出　　处：《气象科技》2006年第3期291-295,共5页Meteorological Science and Technology

基　　金：国家自然科学基金课题"我国雹云结构和防雹机理研究"(40275001)资助

摘　　要：对2002年9月27日发生在山东省境内的一次冰雹天气过程进行了中小尺度和雷达资料分析。结果表明:华北冷性低槽的东移南压,并配合低空切变线和地面冷锋的共同影响是这次过程的直接大尺度影响系统;高空冷平流、地面暖平流,在对流层中低层形成了大范围上冷下暖的不稳定层结;低层中尺度低压环流的扰动,并与高空急流南侧的辐散区耦合,产生强烈的上升运动;雷达回波分析也发现,这次过程具有典型的小型超级单体风暴特征,存在并维持尺度较小的中气旋结构。An analysis is made of the process of a hail-storm event occurred in Shandong Province on 27 September 2002. The primary results indicate that the main influencing systems include the southward movement of an upper-level cold trough in cooperation with the low-level shear line and the frontal zone on the ground. The cold advection in the upper air and the warm advection in the lower level resulted in the large-scale unstable zone of potential energy from the middle-level to the low-level of the troposphere. The coupling of a meso-scale low pressure and the divergence zone of an upper-level jet caused strong upward motion. This is a typical small super-cell storm. The mesocyclone is found in the storm by analyzing the radar echo.

关 键 词：冰雹云 中气旋 诊断分析 

分 类 号：P444[天文地球—大气科学及气象学] V321.213[航空宇航科学与技术—人机与环境工程]