国防科技大学学报2017，Vol.39Issue(5)：14-20,44,8.DOI:10.11887/j.cn.201705003
香港地区2013-2016年地基GPS大气可降水量与实际降雨量的比较
Comparison between GPS-derived precipitable water vapor and rainfall during 2013 to 2016 over Hong Kong
摘要
Abstract
The atmospheric PWV (precipitable water vapor) was derived from GPS observations of 5 stations over Hong Kong during four years from 2013 to 2016 and the accuracy of PWV(GPS) was assessed with PWV(ECMWF).Based on harmonic analysis,the PWV(GPS) was then compared with rainfall.Taking PWV (ECMWF) monthly means as reference,results show that the RMS (root mean square) of PWV (GPS) monthly means is between 1.02 mm and 3.07 nun and the bias is between-2.14 mm and 2.52 mm.Both PWV and rainfall have similar periodic characteristics.The peaks of PWV occur in July with amplitudes varying between 14.65mm and 16.79mm.And the peaks of rainfall also occur in July and the amplitudes are between 147.64 mm and 211.01 mm.The annual increase rate of PWV is positive at each GPS station,which indicates that the PWV over Hong Kong has an increasing trend during the past 4 years.While the annual increase rate of the actual rainfall is negative except in HKOH station,which means a decreasing trend during the 4 years.关键词
全球定位系统/大气可降水量/实际降雨量/谐波分析Key words
GPS/precipitable water vapor/rainfall/harmonic analysis分类
天文与地球科学引用本文复制引用
徐晓华,刘宏康,罗佳..香港地区2013-2016年地基GPS大气可降水量与实际降雨量的比较[J].国防科技大学学报,2017,39(5):14-20,44,8.基金项目
国家自然科学基金资助项目(41374036) （41374036）
国家重点基础研究发展计划资助项目(2013CB733302) （2013CB733302）
