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地基GPS反演大气水汽总量的初步试验
引用本文:何平,徐宝祥,等.地基GPS反演大气水汽总量的初步试验[J].应用气象学报,2002,13(2):179-183.
作者姓名:何平  徐宝祥
作者单位:中国气象科学研究院, 北京 100081
基金项目:科技部攀登专项 95 专 3及G1 9980 4 0 90 6 1 2
摘    要:1998年5~6月的“海峡两岸及邻近地区暴雨试验”(HUAMEX) 期间, 同时进行了小规模的地基GPS长时间连续估测大气水汽总量的外场试验。试验中应用探空和地面降水资料与GPS反演结果进行了比较分析。地基GPS反演的大气水汽总量与探空得到的大气水汽总量, 两者随时间演变的趋势一致, 两者估算的水汽总量平均偏低6.5 mm, 两者偏差的均方差为4.3 mm。GPS反演的大气水汽总量随时间明显的呈周期性变化, 平均周期为7.2天。从GPS反演的大气水汽总量随时间演变图上可以清楚地看出水汽的积累与释放过程, 并与地面降水存在一定的对应关系, 地面降水大多发生在GPS反演的水汽总量处于相对高值且变化率较大的时候。

关 键 词:GPS    干延迟    湿延迟    水汽总量
收稿时间:2000-07-13
修稿时间:2000年7月13日

The Preliminary Experiment on Deriving on Deriving Integrated Atmospheric Water Vapor from Ground-based GPS
He Ping,Xu Baoxiang,Zhou Xiuji,Wang Hongyan.The Preliminary Experiment on Deriving on Deriving Integrated Atmospheric Water Vapor from Ground-based GPS[J].Quarterly Journal of Applied Meteorology,2002,13(2):179-183.
Authors:He Ping  Xu Baoxiang  Zhou Xiuji  Wang Hongyan
Affiliation:Chinese Academy of Meteorological Sciences, Beijing 100081
Abstract:The field experiment named "HUAMEX" was conducted in China from May to June 1998. In this experiment, a regional GPS network that included three ground based GPS receiving stations (Shantou, Yangjiang and Haikou) was established to estimate integrated atmospheric water vapor (IWV) continuously. The comparison of IWV estimates derived from GPS and radiosonde observations for a 51 day period at Shantou station is given. Both have an average bias of 6.5 mm,and the root mean square difference is 4.3 mm. The IWV derived from GPS varies with time and it has an obvious period of 7.2 days in average. Moreover, the IWV derived from GPS is compared with the observed surface integrated precipitation hour by hour. The comparison of GPS derived IWV and integrated surface precipitation indicates that there is a good coincidence between them. The variation period of GPS IWV is similar to that of surface precipitation. From the time series of IWV estimated from GPS, the accumulating and releasing processes of water vapor are obvious.
Keywords:GPS\  Dry delay\ Wet delay\ Integrated atmospheric water vapor
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