摘要
以贵州省三岔河流域为研究区域,利用2018年1月1日~2020年12月31日期间的76个气象站观测数据评估全球降水观测计划多卫星降水产品IMERG(Integrated Multi-satellitE Retrievals for GPM)的雨量站订正产品IMERG Final Run(IMERG_FR)和准实时产品IMERG Early Run(IMERG_ER)在岩溶地貌的小流域的降水观测准确度,通过设定不同的降水阈值评估IMERG两种降水产品IMERG_FR和IMERG_ER对不同降水量区间的探测能力,评估指标包括相关系数(CCC)、相对偏差(RRB)、均方根误差(RRMSE)、探测率(PPOD)、临界成功指数(CCSI)和误报率(FFAR)。结果表明,在整体上,IMERG_FR和IMERG_ER在该小型流域有一定降水探测能力,对降水强度的估算精度还存在提升空间。
Rainfall observations derived from 76 ground rainfall gauges from January 1, 2018 to December 31, 2020 were used to evaluate the accuracy of IMERG Final Run(IMERG_FR) and IMERG Early Run(IMERG_ER) in IMERG(Integrated Multi-satellitE Retrievals for GPM) products over the small Sancha River basin in Guizhou Province. This study aimed to explore the precipitation detection capacity of IMERG_FR and IMERG_ER on different time scales. Metrics for assessment include correlation coefficient(CCC), relative bias(RRB), root-mean-squared error(RRMSE), probability of detection(PPOD), false alarm ratio(FFAR), critical success index(CCSI). The performance of IMERG was assessed at different time scale with different precipitation thresholds. The results show that the IMERG_FR and IMERG_ ER have a certain precipitation detection ability in the small basin on the whole, and it still needs to improve the accuracy of IMERG products in estimating precipitation intensity.
作者
曾莉萍
梁振清
陈生
李峙
朱慧琴
ZENG Li-ping;LIANG Zhen-qing;CHEN Sheng;LI Zhi;ZHU Hui-qin(Meteorological Service Center of Guizhou Province,Guiyang 550001,China;Meteorological Technology and Equipment Center of Guangxi Zhuang Autonomous Region,Nanning 530022,China;Heihe Remote Sensing Experimental Research Station,Northwest Institute of Eco-Environment and Resources,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Key Laboratory of Remote Sensing of Gansu Province,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;School of Geographic Science and Planning,Ministry of Education,Nanning Normal University,Nanning 530ool,China;Key Laboratory of Beibu Gulf Environmental Evolution and Resource Utilization,Ministry of Education,Nanning Normal University,Nanning 530001,China)
出处
《水电能源科学》
北大核心
2023年第1期10-13,共4页
Water Resources and Power
基金
国家自然科学基金项目(41875182)
北部湾环境演变与资源利用教育部重点实验室(南宁师范大学)开发基金(NNNU-KLOP-K2103)。
关键词
GPM
IMERG
卫星降水观测
三岔河流域
GPM
IMERG
satellite precipitation observation
Sancha river basin in Guizhou
