GPS/PWV与第五代大气再分析数据的短时强降水分析  

Analysis of short-term heavy precipitation based on GPS/PWV and the fifth generation climate reanalysis data

作　　者：窦世标 付乃锋 涂宏京 谷守周[4] 李博 王楚扬[6] DOU Shibiao;FU Naifeng;TU Hongjing;GU Shouzhou;LI Bo;WANG Chuyang(The Third Geodetic Surveying Brigade of Ministry of Natural Resources,Chengdu 610100,China;School of Marine Science and Technology,Tianjin University,Tianjin 300072,China;National Quality Inspection and Testing Center for Surveying and Mapping Products,Beijing 100036,China;Chinese Academy of Surveying&Mapping,Beijing 100036,China;School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Shanghai Waterway Engineering Design and Consulting Co.,Ltd.,Shanghai 200100,China)

机构地区：[1]自然资源部第三大地测量队,成都610100 [2]天津大学海洋科学与技术学院,天津300072 [3]国家测绘产品质量检验测试中心,北京100036 [4]中国测绘科学研究院,北京100036 [5]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [6]中交上海航道勘察设计研究院有限公司,上海200100

出　　处：《测绘科学》2023年第7期46-53,共8页Science of Surveying and Mapping

基　　金：云遥宇航星座计划项目(22ZYQGX00060);跨区域GNSS连续运行基准站网数据整合与跨网服务技术研究项目(J2017ZC01);北斗时空信息应用服务平台建设项目(2023KJ01)。

摘　　要：针对全球升温、极端天气增加、我国西北短时暴雨增多等现象,该文结合ERA5降水数据和气象站采集的实际降水量,利用我国西北干旱地区GPS观测数据反演的GPS/PWV对一次短时强降水过程进行分析。结果表明:①GPS/PWV的积累和变化与实际降水发生时刻及降水量具有密切联系,特别是GPS/PWV在陡升陡降及高位震荡与降水实际发生具有较强的对应关系,对GPS/PWV应用于我国西北干旱地区短时强降水预报及防灾减灾等具有一定的参考意义;②ERA5数据记录的降水事件与气象站记录的实际降水的发生存在较好的对应关系,但降水发生时刻及降水量与实际降水相比准确性较差。该研究对于增强数值同化和机器学习在短时暴雨及极端天气等预报具有重要意义。In the face of global warming,the increase of extreme weather,as well as short-term heavy rains in Northwest of China.Based on the precipitation data from ERA-5 and the local meteorological station,the GPS/PWV retrieved from the GPS observations in the northwest arid regions of China was used to analyzed a short-term heavy precipitation process,and some conclusions were found.①The accumulation and changes of GPS/PWV are closely related to the time and amount of an actual precipitations,especially the steep rise and fall of GPS/PWV and high-level oscillations have a strong corresponding relationship with the actual occurrence of precipitation,which shows that GPS/PWV is a very meaningful reference for short-term heavy precipitation forecast,disaster prevention and mitigation in arid areas.②There is a good event correspondence between the REA5data and the actual occurrence of precipitation,but the accuracy of the precipitation occurrence time and amount is poor.The study have great significance for enhancing numerical assimilation and machine learning in short-term heavy rain and extreme weather forecasting.

关 键 词：GPS/PWV ERA5 强降水 降水预报 灾害防治 

分 类 号：P228[天文地球—大地测量学与测量工程]