应用湿Q矢量诊断梅雨锋暴雨  

Using the Wet Q-vector to Diagnose a Process of Meiyu Front Heavy Rain

作　　者：刘志雄[1] 岳彩军[1] 寿绍文[1] 董美莹[1] 

机构地区：[1]南京气象学院大气科学系,江苏南京210044

出　　处：《南京气象学院学报》2003年第1期102-110,共9页Journal of Nanjing Institute of Meteorology

基　　金：国家自然科学基金项目 (4 0 0 75 0 0 9)

摘　　要：利用湿 Q矢量 ,结合改进的 MM4 ( MMM4 )模式模拟输出的加密资料 ,细致地诊断分析了 1 991 - 0 7- 0 5T2 0— 0 6 T2 0一次典型的江淮梅雨锋暴雨过程。结果表明 :湿 Q矢量散度辐合场随高度向北倾斜 ;在梅雨锋暴雨发展、衰亡阶段 ,湿 Q矢量散度散、合场在垂直方向上主要呈现出了相间分布的特点 ;从湿 Q矢量散度辐合场这个角度探讨了梅雨锋暴雨的内在机理 ,并给出了梅雨锋暴雨具体预报的新思路。Using the wet Q-vector and combining with the intense data output of the modified MM4(MMM4) model simulation,a typical Meiyu front heavy rain process occurred during 5-6th July 1991 in the Changjiang-Huaihe Basin is diagnosed carefully in this paper. The results are as follows:the convergence field of wet Q-vector divergence tilts northwards with height; the divergence/convergence fields of wet Q-vector divergence show an alternate distribution in the vertical direction at the developing and decaying stages of Meiyu front heavy rain; based on the convergence field of wet Q-vector divergence,the intrinsic mechanism of Meiyu front heavy rain is discussed, and a new thinking for the forecast of Meiyu front heavy rain is given.

关 键 词：湿Q矢量 梅雨锋暴雨 诊断分析 MM4模式 散度 

分 类 号：P458.121[天文地球—大气科学及气象学]