Journal of Arid Meteorology

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Features of Precipitable Water Vapor ( Pwv) Data /GPS During the Summer Rainstorm Processes in Chongqing

MIN Fanhua1XIA Baicheng2LIU De1CHEN Guichuan1   

  1. 1. Chongqing Meteorological Observatory,Chongqing 401147,China;
    2. Meteorological Service Center of Chongqing,Chongqing 401147,China
  • Received:2012-08-17 Revised:2012-11-12 Online:2013-03-30 Published:2013-03-01

大气可降水量在重庆夏季暴雨天气过程中的特征分析

闵凡花1夏佰成2 刘德1陈贵川1   

  1. 1. 重庆市气象台,重庆401147; 2. 重庆市气象服务中心,重庆401147)
  • 作者简介:闵凡花( 1978 - ) ,女,山东德州人,硕士研究生,现从事天气预报服务方面的工作. E - mail: minfanhua_xia@126. com
  • 基金资助:

    重庆市气象局业务技术攻关团队项目“重庆暴雨预报技术研究( 2012 年) ”和重庆市气象局青年基金项目“GPS /MET 观测资料在气候分析中的应用研究QNJJ -201106”资助

Abstract:

Based on precipitable water vapor ( Pwv) data obtained from ground - based GPS network in Chongqing,the evolution characteristics of Pwv during rainstorm weather processes occurred in early summer and midsummer were analyzed. Results show that the value of Pwv was different in rainy day and no rain day,and in early summer,Pwv often increased rapidly in 20 - 35 hours before rainstorm occurrence with the increasing rate of 0.9 - 1.6 mm/h. while in midsummer,the value of Pwv increased relatively slow in 10 -25 hours before rainstorm occurrence with the increasing rate of 0.4 - 1.0 mm/h. Rainstorm often occurred when Pwv decreased from its peak to trough in both early summer and midsummer,but occurrence time of rainstorm was often different from each other.

Key words: rainstorm, Pwv,  characteristics

摘要:

利用重庆地区地基GPS 观测网反演的大气可降水量( Pwv) 数据,选取初夏和盛夏暴雨天气过程分析Pwv 的变化特征。结果表明,降雨日和非降雨日的Pwv 值有所不同; 初夏暴雨发生前20 ~35h,Pwv 值会出现持续快速增加,升幅在0.9 ~ 1.6 mm/h,而盛夏暴雨前的10 ~ 25 h,Pwv 的增加相对缓慢,升幅在0.4 ~ 1.0 mm/h; 初夏和盛夏的暴雨均出现在Pwv 由峰值向波谷的变化过程中,但出现时间不同。

关键词: 暴雨, 可降水量, 特征

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