气象与环境学报2011，Vol.27Issue(1)：1-6,6.
华北一次强对流暴雨的湿位涡诊断分析
Diagnostic analysis of moist potential vorticity for a rainstorm in North China
摘要
Abstract
Based on the conventional ground observational data and regional intensive precipitation data from weather station as well as the NCEP reanalysis data (horizontal resolution with 1 o x 1 o, time interval with 6 h),moist potential vorticity (MPV) of a rainstorm process on June 8,2009 in North China was analyzed. The results indicate that the distribution characteristics of MPV are indicative of occurrence and falling area of rainstorm. The vertical overlapping of the positive and negative MPV1 areas is favorable to the generation and development of rainstorm. The rainstorm area is located near the transition zone of positive value and negative value of MPV,MPV1 and MPV2 at 850 hPa. This zone is also the conjoint area of convective instability and baroclinic instability.The region in which isentropes of θse is nearly linear is favorable to the increase of vertical vorticity and occurrence of rainstorm.关键词
强对流暴雨/湿位涡/诊断分析/华北Key words
Severe convective rainstorm/ Moist potential vorticity (MPV) /Diagnostic analysis/North China分类
天文与地球科学引用本文复制引用
高万泉,周伟灿,李玉娥..华北一次强对流暴雨的湿位涡诊断分析[J].气象与环境学报,2011,27(1):1-6,6.基金项目
保定市气象局"决策气象服务系统(2010)"基金项目资助. （2010）
