台风期间GNSS-PWV与降雨量的相关性探究——以上海市为例  

Investigation on the Correlation Between GNSS-PWV and Precipitation During Typhoon:A Case Study of Shanghai

作　　者：王钦 姚宜斌[1,2] 刘晨 许超钤[1] WANG Qin;YAO Yibin;LIU Chen;XU Chaoqian(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]武汉大学地球空间环境与大地测量教育部重点实验室,湖北武汉430079

出　　处：《测绘地理信息》2023年第5期13-16,共4页Journal of Geomatics

基　　金：国家自然科学基金(41721003,41874033,42004019)。

摘　　要：基于上海市连续运行基准站(continuously operating reference station,CORS)系统中10个基准站2021-09-10—2021-09-14的观测数据,采用实时精密单点定位(precise point positioning,PPP)技术反演大气可降水量(precipitable water vapor,PWV),探究了台风“灿都”期间PWV与实际降雨量的时空交互特征。结果表明,PWV含量与降雨量显著相关,即PWV在降雨发生前激增,降雨期间保持稳定,降雨完成后回落至原水平。此外,PWV的空间演变还可揭示台风影响期间的水汽输送路径。上述特征证明,实时PWV有预警极端降雨的潜力,未来可在CORS系统部署降雨预警模块,进一步拓宽其服务领域。Based on the observation data from 10 stations in continuously operating reference station(CORS)system in Shanghai from September 10,2021 to September 14,2021,we use real-time precise point positioning(PPP)technology to retrieve precipitable water vapor(PWV),and explore the spatiotemporal interaction between PWV and actual precipitation during typhoon“Chanthu”.The results show that PWV content is significantly correlated with precipitation,i.e.,PWV surges before rainfall,then remains stable during rainfall,finally falls back to the original level after rainfall.Additionally,the spatial changes of PWV can also reveal the water vapor transport path during the typhoon.The above phenomenon suggests that real-time PWV has the potential capability for extreme precipitation warnings.In the future,the rainfall warning module can be deployed in the CORS system to expand its service fields.

关 键 词：大气可降水量(precipitable water vapor PWV) 实时精密单点定位 连续运行基准站(continuously operating reference station CORS) 台风 降雨 

分 类 号：P228[天文地球—大地测量学与测量工程] P426[天文地球—测绘科学与技术]