人民珠江2025，Vol.46Issue(5)：41-50,10.DOI:10.3969/j.issn.1001-9235.2025.05.005
GPM系列降水产品对北京"23·7"暴雨事件的监测能力评估
Evaluation of Monitoring Capability of GPM-Series Precipitation Products for Beijing"23·7"Heavy Rainfall Event
摘要
Abstract
This study aimed to evaluate the monitoring capability of remote sensing precipitation products associated with global precipitation measurement(GPM),specifically the GSMaP and IMERG products during heavy rainfall events.By using the Beijing"23·7"heavy rainfall event as a case study,based on 3-hourly observation data from ground stations within the study area,both near-real-time remote sensing precipitation products(GSMaP_NRT,IMERG_ER,and IMERG_LR)and post-processed remote sensing precipitation products(GSMaP_MVK,GSMaP_Gauge,and IMERG_FR)were comprehensively evaluated and analyzed.Precipitation statistical metrics(CC,RMSE,P-BIAS,and KGE)and precipitation detection metrics(POD,FAR,CSI,and HSS)were used to systematically evaluate the products'monitoring capability for heavy rainfall events across different spatial and temporal scales.Additionally,the temporal variation of the precipitation products was thoroughly analyzed based on the spatial scale of the study area.The results indicate that IMERG_FR shows the best overall precipitation monitoring capability(P-BIAS=-0.41,KGE=0.54).The GSMaP_NRT and GSMaP_MVK demonstrate strong performance in characterizing the distribution of precipitation,while the IMERG series performs better in metrics with more concentrated distribution(0.48<KGE<0.54,0.59<HSS<0.66).Near-real-time products generally overestimate extreme precipitation,while post-processing correction introduces additional instability while correcting the bias.Both types of products are affected by topographic factors and perform poorly in areas with elevation transitions(KGE<0.5).Additionally,both types of products exhibit temporal advances or delays during extreme precipitation events.关键词
遥感降水产品/GSMaP/IMERG/"23·7"极端降水/多尺度评价Key words
remote sensing precipitation products/GSMaP/IMERG/"23·7"extreme precipitation/multi-scale evaluation分类
建筑与水利引用本文复制引用
郭彬斌,郎廷中..GPM系列降水产品对北京"23·7"暴雨事件的监测能力评估[J].人民珠江,2025,46(5):41-50,10.基金项目
湖南省自然科学基金项目(2025JJ50300) （2025JJ50300）
湖南省教育厅科学研究项目(24B0921) （24B0921）
湖南省普通高校哲学社会科学重点研究基地开放基金(2023HSKFJJ001) （2023HSKFJJ001）
衡阳师范学院教学改革研究项目(JYKT202301Z) （JYKT202301Z）
湖南省研究生科研创新项目(CX20231241) （CX20231241）
