气象与环境学报2024，Vol.40Issue(3)：65-75,11.DOI:10.3969/j.issn.1673-503X.2024.03.008
全球IMERG卫星反演和ERA5陆面再分析降水在四川地区的适用性研究
Research on the applicability of IMERG satellite retrieval and ERA5 land reanalysis precipitation products in Sichuan region,China
摘要
Abstract
Using precipitation observation data from China Meteorological Administration ground stations from 2019 to 2020,six quantitative evaluation indicators including correlation coefficients(CCs),mean bias errors(MBEs),root mean square errors(RMSEs),probability of detections(PODs),false alarm rates(FARs),and critical success indices(CSIs)were used to analyze the accuracy and regional applicability of the IMERG multi-satellite remote sensing retrieval of the Global New Generation Global Precipitation Measurement Program(GPM)and the European Centre for Medium-Range Weather Forecasts(ECMWF)Fifth Generation Land Surface Reanal-ysis(ERA5L)precipitation products in Sichuan region,China.The results show that the two products have a strong precipitation zone on the eastern side of the western Sichuan Plateau,roughly distributed in a quasi north-south direction,and that ERA5L can capture heavy precipitation centers more accurately compared to IMERG.The consistency between station observations within the basin is better than in the surrounding mountainous areas.The precipitation of IMERG and ERA5L was 15.2%and 33.3%,respectively,higher than that observed by the sta-tion,respectively.The two products have a relatively high ability to capture precipitation events in the western Si-chuan Plateau,with low FAR.From the perspective of time test statistical indicators,the trends and magnitude changes observed by the two products and stations are basically consistent,with relatively high relative station ob-servations being the main trend.Compared to IMERG,ERA5L has a high CC with site observations,a high POD,a high CSI,and a low deviation,but a relatively high FAR.Overall,both IMERG and ERA5L precipitation prod-ucts have shown certain potential for application in Sichuan province,but there are significant differences in accura-cy under different precipitation intensities and terrain conditions,requiring product correction.关键词
降水/卫星反演/陆面再分析/IMERG/ERA5L/精度评价Key words
Precipitation/Satellite retrieval/Land surface reanalysis/Integrated Multi-satellite Retrievals for GPM(IMERG)/European Fifth Generation Land Surface Reanalysis(ERA5L)/Accuracy evaluation分类
天文与地球科学引用本文复制引用
黄晓龙,向筱铭,王丽伟,李施颖,蒋雨荷..全球IMERG卫星反演和ERA5陆面再分析降水在四川地区的适用性研究[J].气象与环境学报,2024,40(3):65-75,11.基金项目
四川省科技厅重点研发计划项目(2022YFS0544、2022YFS0541)、高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金重点专项(SCQXKJZD202102)、中国气象局创新发展专项(CXFZ2023J067)和国家重点研发计划(2022YFC3003904)共同资助. （2022YFS0544、2022YFS0541）
