2005年淮北大暴雨成因诊断的个例分析  

A diagnostic analysis of heavy rain of Huaibei in Jiangsu of 2005

作　　者：尹东屏[1] 张备[1] 赵凯[1] 张冰[1] 裴海瑛[1] 

机构地区：[1]江苏省气象台,南京210008

出　　处：《气象科学》2008年第B12期46-51,共6页Journal of the Meteorological Sciences

基　　金：国家基金委项目(40675056)

摘　　要：通过对2005年7月10日江苏淮北区域性大暴雨分析得出:高低空急流的耦合对暴雨的产生起着重要作用,湿位涡的正压项的绝对值的增大与降水的增幅成正比,斜压项随降水的增幅增大,表明在"05710"暴雨发生的过程中不仅有对流不稳定能量存在,又有倾斜涡度的发展;同时低层水汽通量辐合的增大和上升运动是这场暴雨产生的关键。The analysis about the heavy rain at Huaibei in Jiangsu on July 10, 2005 has been given. The coupling of upper and low jet flows played an important role. The absolute value tended to grow with the precipitation＇s increment. And so did the barotropic part MPV1 of wet potential vorticity. Hence there is not only convective instability energy but also developing of baroclinic vorticity on July 10, 2005. The increment of moisture convergence and vertical velocity are important factors.

关 键 词：暴雨 急流 湿位涡 水汽辐合 上升运动 

分 类 号：P426.621[天文地球—大气科学及气象学]