主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2011, Vol. 27 ›› Issue (1): 1-6.doi:

• 论文 •    下一篇

华北一次强对流暴雨的湿位涡诊断分析

高万泉1,2  周伟灿3  李玉娥2   

  1. 1. 南京信息工程大学大气科学院, 江苏 南京 210044;2. 保定市气象局,河北 保定071000;3. 南京信息工程大学气象灾害重点实验室, 江苏 南京 210044
  • 收稿日期:2010-09-08 修回日期:2010-11-22 出版日期:2011-02-28 发布日期:2011-02-28

Diagnostic analysis of moist potential vorticity for a rainstorm in North China

GAO Wan-quan1,2 ZHOU Wei-can3 LI Yu-e2   

  1. 1.College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. Baoding Meteorological Bureau, Baoding 071000, China; 3. Key Laboratory of Meteorological Disaster in Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2010-09-08 Revised:2010-11-22 Online:2011-02-28 Published:2011-02-28

摘要: 应用常规地面观测资料、区域加密站降水资料、NCEP再分析资料(水平分辨率1°×1°,间隔为6 h),对2009年6月8日发生在华北的一次强对流暴雨过程的湿位涡场进行了诊断分析。结果表明:湿位涡的分布对强对流暴雨的发生、落区有较强的指示性作用,MPV1“正负值区垂直叠加”的配置是强对流暴雨发生、发展的有利形势。暴雨出现在850 hPa上MPV、MPV1、MPV2正负值过渡带附近,是对流不稳定与斜压不稳定相结合的地区。θse的等值线接近垂直的地区有利于垂直涡度的增长,亦有利于强降水发生。

关键词: 强对流暴雨, 湿位涡, 诊断分析, 华北

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°×1°, 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.

Key words: Severe convective rainstorm, Moist potential vorticity (MPV), Diagnostic analysis, North China

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