摘要
利用常规天气图、卫星云图、区域自动气象站、新一代天气雷达等资料对2009年5月9-10日发生在山东省中北部大范围强降水过程进行了综合分析。分析发现:本次山东大暴雨天气过程主要是在稳定大尺度环流下,低层中尺度切变线在华北南部稳定少动造成的,低空西南急流在山东中北部的强风速风向辐合为大暴雨的产生输送了充足的水汽。从流场分析这次大暴雨的水汽主要来自南海;地面冷锋是本次大暴雨不稳定能量释放的启动机制;高低空急流的耦合加强了对流的发展;持续时间长是形成大暴雨的一个主要原因。
The largescale heavy rain process on May 9 -10, 2009 occurred in the middle and northern part of Shandong province was analyzed comprehensively by using conventional weather chart, satellite image, the data observed by regional automatic weather station, CINRAD data Etc. The results showed： The heavy rain in Shandong was due to the stability of large - scale circulation and the stability of mesoscale low - level shear in south part of North China and adequate water transported by convergence of strong winds of Southwest jet at low - alti- tude. The water of heavy rain was mainly from the South China Sea; Surface cold front launched the mechanism of release of unstable enegy;Coupling level jets enhanced the development of convection;long duration was a major cause of the formation of heavy rain.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2011年第1期105-110,共6页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
暴雨
水汽通量
急流
假相当位温
中尺度对流系统
Heavy rain
water vapor flux
jet
pseudoequivalent potential temperature
mesoscale convectivesystem
