气象2017，Vol.43Issue(12)：1534-1546,13.DOI:10.7519/j.issn.1000-0526.2017.12.009
基于江西省水文资料对中国融合降水产品的质量评估
Quality Assessment of China Merged Precipitation Product Using Hydrological Data in Jiangxi Province
摘要
Abstract
In this paper,the quality of 5 km and 10 km merged precipitation developed by China National Meteorological Information Centre is assessed based on the hydrological observed precipitation.Besides the U.S.National Oceanic and Atmospheric Administration (NOAA) climate prediction center satellite precipitation products (CMORPH) and the East Asian multi-satellite integrated precipitation (EMSIP) developed by National Meteorological Information Centre are also assessed by comparing the two merged precipitation products.The data error of each precipitation product and its spatio-temporal variation characteristic are analyzed to verify the applicability of merged precipitation product in this selected region.The results show that the merged precipitation and satellite precipitation can well reflect the variation tendency of annual hourly precipitation.Four precipitation products all have a certain underestimate compared with the hydrological observed precipitation,and the underestimate of the satellite precipitation is larger.Merged precipitation has better quality,and the accuracy of the 5 km merged precipitation (R=0.81,RMSE=2.12 mm · h-1,RE=-5.4％) is better than the 10 km merged precipitation (R=0.78,RMSE=2.3 mm · h-1,RE=-5.1％).There is a great difference between the satellite precipitation and the hydrological observed precipitation.The correlation coefficient of CMORPH and EMSIP precipitation products is only 0.19 and 0.24,respectively.The error of each precipitation product has the same monthly variation tendency,and the error variation range of the merged precipitation product is obviously smaller than that of the satellite precipitation product.Besides,the quality variation of the four precipitation products in different rainfall level is also discussed,which shows that the correlation of the four precipitation products increases with the increase of precipitation.Merged precipitation products can accurately show the spatial structure and the central location of precipitation,5 km merged precipitation takes great advantage in monitoring the severe precipitation events.关键词
融合降水产品/卫星降水产品/水文站观测降水/质量评估Key words
merged precipitation product/satellite precipitation product/hydrological observed precipitation/quality assessment分类
天文与地球科学引用本文复制引用
李显风,周自江,李志鹏,潘旸,师春香,沈艳,徐宾,谷军霞..基于江西省水文资料对中国融合降水产品的质量评估[J].气象,2017,43(12):1534-1546,13.基金项目
国家自然科学基金项目(91437220)、公益性行业(气象)科研专项(GYHY201506002和GYHY201306045)及中国气象局“气象资料质量控制及多源数据融合与再分析”创新工程项目共同资助 （91437220）
