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

气象与环境学报 ›› 2014, Vol. 30 ›› Issue (5): 38-48.doi:

• 论文 • 上一篇    下一篇

GPS遥感大气可降水量在大连地区3次降水过程中的应用

程航1 程相坤2 朱晶3 李鸿强2 刘晓初1   

  1. 1. 大连市气象台，辽宁 大连 116001；2. 大连市金州区气象局，辽宁 大连 116001；3. 大连市气象局业务处，辽宁 大连 116001
  • 出版日期:2014-11-01 发布日期:2014-11-01

Application of precipitable water vapor from ground based GPS to three precipitation processes in Dalian region

CHENG Hang1  CHENG Xiang-kun2  ZHU Jing3  LI Hong-qiang4  LIU Xiao-chu1   

  1. 1. Dalian Meteorological Service, Dalian 116001, China; 2. Meteorological Service in Jinzhou District of Dalian, Dalian 116001, China; 3. Department of Operation Business in Dalian Meteorological Service, Dalian 116001, China
  • Online:2014-11-01 Published:2014-11-01

PDF (PC)

18295

被引次数

7

摘要：

利用大连市气象局地基GPS/MET观测网大气可降水量（PWV）数据，分析2011年大连瓦房店、庄河和长海地区降水天气过程PWV的变化特征及其与降水量和降水强度的关系，在此基础上通过分析物理量场和天气系统，探讨大尺度水汽输送、辐合与PWV变化的关系及GPS在暴雨天气中的应用。结果表明：PWV的增长方式受当地天气系统的支配和制约，对一次明显的降水过程，从开始至结束PWV的变化与降水量有明显的相关性。当有水汽由南向北输送时，PWV在降水开始前逐渐增长，当地面及高空有大范围的水汽辐合且高空比湿值大于10 g·kg-1时，PWV显著增长（降水开始前4—5 h），主要降水时段与PWV峰值相对应，同时PWV的增幅大小与降水强度有明显的关系。

关键词: 大气可降水量（PWV）, 水汽输送, 降水量, 降水强度

Abstract:

Based on precipitable water vapor (PWV) data from GPS/MET observation network in Dalian, characteristics of PWV and its relationships with precipitation and precipitation intensity in Wafangdian, Zhuanghe and Changhai regions in 2001 were analyzed. According to the above analysis and physical quantity field as well as weather system, relationships of PWV variation with large-scale water vapor transport convergence and moisture convergence, and application of GPS to a rainstorm process were discussed. The results show that increase of PWV is often restricted by the local weather system. For a clear precipitation process, PWV changes and precipitation have a clear relation from beginning to end of the precipitation process. When water vapor transports from south to north, PWV increases gradually before precipitation begins. When it has large range moisture convergence at surface and upper level, and specific humidity reaches above 10g·kg-1, PWV increases significantly in previous 4-5 hours of rainstorm. Main precipitation period corresponds to the peak value of PWV. Meanwhile, PWV increment has a significant relation with precipitation intensity.

Key words: Precipitable water vapor (PWV), Moisture tansform, Precipitation, Precipitation intensity