2013年梅雨期一次暴雨过程诊断分析  

Diagnostic analysis of a rainstorm in 2013

作　　者：陈舒慧[1] 傅帅[2] 张小泉 

机构地区：[1]南京信息工程大学语言文化学院,江苏南京210044 [2]南京信息工程大学空间天气研究所,江苏南京210044 [3]武义县气象局,浙江武义321200

出　　处：《贵州科学》2016年第5期49-54,共6页Guizhou Science

基　　金：公益性行业(气象)科研专项(GYHY201306073);南京信息工程大学实践创新训练计划项目(201610300051)联合资助

摘　　要：以2013年梅雨期7月4—5日江淮地区的一次暴雨过程为例,利用FNL资料以及江淮地区226个自动气象站观测资料,从降水概况、环流形势、水汽条件、垂直运动条件、以及大气层结的稳定性等方面,对本次暴雨过程进行了诊断分析。研究表明:暴雨主要与低空西南风急流、副热带高压以及高空急流密切相关。在此次过程中,江淮地区水汽通量较大,且上升运动较强。对江淮上空K指数的计算发现,在暴雨过程中,江淮地区K指数值较大,大气层结非常不稳定,极易造成强降水。因此,有利的环流形势,充足的水汽,强盛而持久的上升运动,以及不稳定的大气层结,最终促成了此次暴雨事件的发生。Taking a rainstorm occurred on July 4 and 5,2013,during the Meiyu period in Jianghuai region as example,based on FNL data and data from 226 automatic meteorological stations,we carried out diagnostic analysis of the rainstorm from aspects of precipitation,circulation situation,water vapor condition,vertical movement condition,and the stability of the atmosphere. The results showed that,the rainstorm was closely related to the low-level southwest jet,subtropical high,and the jet stream. In the process of the rainstorm,the water vapor flux was big,and the rise movement in Jianghuai region was relatively strong. By calculating the K index,we found that over the process of the rainstorm,the K index value in Jianghuai region was high,and the atmosphere was very unstable. In conclusion,the favorable circulation situation,combined with plenty of water vapor,strong and persistent upward movement and extremely unstable atmosphere knot,finally led to the rainstorm.

关 键 词：江淮地区 梅雨期 暴雨 诊断分析 

分 类 号：P458.121.1[天文地球—大气科学及气象学]