闽西北“2002．6．13--6．18”大暴雨天气成因的初步分析

Feature Analysis Of The Heavy Storm From 13 To 18 June Of 2002 in Northwest Of Fujian

本文通过对“2002．6．13—6．18”大暴雨天气过程的常规资料和物理量诊断分析，发现闽西北大暴雨是发生在高空形势稳定，中低层有切变线、静止锋和西南急流存在的情况下，并且西南低空急流为大暴雨区提供了充沛的水汽输送和不稳定能量，急流最大风速出口的辐合上升运动有利于中尺度扰动发展，促使垂直运动加强，激发了不稳定能量的释放。

By analysis of general data and physical feature field of the heavy storm from 13 To 18 June of 2002, it shows that the storm broke out while the high altitude is static. There are a shear, ataionary front and south-east jet on the low or middle layer.The southeast jet would cause large water and instabiligy energy. The strong upward vertical movement is beneficial to development of the meso-scale disturbance, it prometes per-sport quicken, and it impels instability energy released.