水资源与水工程学报2025，Vol.36Issue(2)：29-39,11.DOI:10.11705/j.issn.1672-643X.2025.02.04
MSWEP降水产品对中国大陆沿海区域极端降水模拟的评估及校正
Evaluation of MSWEP for modelling extreme precipitation in the coastal region of China's mainland and its correction method
摘要
Abstract
Multi-source weighted-ensemble precipitation(MSWEP)is a high-resolution gridded precipi-tation product,in this study its simulation accuracy for the precipitation in the coastal area of China's mainland is evaluated in detail.This evaluation is based on the precipitation data collected from 96 mete-orological stations located in the coastal provinces from 1979 to 2020.In this study,we adopted Cress-man algorithm to correct the MSWEP,analysed the sensitivity of the search radius(R)to the correction results,and evaluated the effectiveness of the corrected MSWEP for precipitation simulation.The results show that MSWEP tends to underestimate the daily precipitation across the entire coastal region,with a slightly better performance for the northern provinces than the southern provinces and significantly under-estimated results in extreme precipitation period.During the typhoon rainstorm period,the overall data error is unacceptably large and the underestimation becomes more obvious with increasing precipitation.According to the sensitivity analysis of R,the optimal value of R is 2.0°and applying correction three times yields the best results.The overall performance of the corrected MSWEP for precipitation simulation is enhanced,and its accuracy for extreme rainstorm simulation is significantly improved.The research outcomes can provide a data support for precipitation related research,as well as disaster prevention and mitigation in the coastal area of China.关键词
降水量/极端降水模拟/MSWEP/Cressman逐步订正法/中国沿海区域Key words
precipitation/extreme precipitation modelling/MSWEP/Cressman algorithm/coastal area of China分类
水利科学引用本文复制引用
李江夏,任宁丹,邓志远..MSWEP降水产品对中国大陆沿海区域极端降水模拟的评估及校正[J].水资源与水工程学报,2025,36(2):29-39,11.基金项目
国家自然科学基金项目(42376201) （42376201）
湖南省自然科学基金项目(2022JJ40483) （2022JJ40483）
