南京信息工程大学学报2012，Vol.4Issue(2)：125-131,7.
副高边缘暴雨过程中的GPS可降水量和假相当位温分布特征
Characteristics of GPS-retrieved precipitable water vapor and ground pseudo-equivalent temperature during a heavy rain of western pacific subtropical high
摘要
Abstract
Based on precipitable water vapor retrieved from ground-based GPS, data of ground automatic meteorological stations and conventional weather data, the evolution tendency of precipitable water vapor and ground pseudo-equivalent temperature during a heavy rain in south central Hebei province is studied. The results show that the heavy rainfall are caused by warm-wet flowing and shear line at the edge of subtropical high, and the precipitation area is between 584 to 588 dagpm lines in 500 hPa,between shear line in 700 to 850 hPa. Rainfall usually occurs when the GPS-retrieved precipitable water vapor is higher than the average value, especially near its maximum value , and the heavy rain period is corresponding to the maximum value stage of precipitable water vapor. Rainfall occurred more often when the deviation coefficient of GPS-retrieved precipitable water vapor is positive, heavy rainfall generally happens while deviation coefficient is higher than 1. For the same station, when GPS-retrieved precipitable water vapor is high,the real precipitation is strong. While for the different stations,the high precipitation is not necessarily represent strong real rainfall,for it is corresponding to the station location and altitude. High-energy accumulation is a necessary condition of rainfall. The rainfall of subtropical high usually occurs in the rapid decline phase of pseudo-equivalent temperature or its valley areas. The precipitation will be stronger when pseudo-equivalent temperature is at high peak,in sharp movement and with long duration of high value.关键词
副高边缘暴雨/GPS可降水量/偏离系数/假相当位温/时空分布Key words
heavy rain of subtropical high/GPS-retrieved precipitable water vapor/deviation coefficient/pseudo-equivalent temperature/ spatial and temporal distribution分类
天文与地球科学引用本文复制引用
李国翠,李国平,岳艳霞,孙云,刘伟..副高边缘暴雨过程中的GPS可降水量和假相当位温分布特征[J].南京信息工程大学学报,2012,4(2):125-131,7.基金项目
中国气象局气象关键技术集成与应用项目(CMAGJ2011M46) （CMAGJ2011M46）
中国气象局西南区域气象中心区域重大科研业务项目(2010-3) （2010-3）
