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	GPM与TRMM降水数据在中国大陆的精度评估与对比
其他题名	Accuracy evaluation and comparison of GPM and TRMM precipitation product over Mainland China
	李麒崙 1; 张万昌 2; 易路 3; 刘金平 1; 陈豪 1
来源期刊	水科学进展
ISSN	1001-6791
出版年	2018
卷号	29 期号:3 页码:303-313
中文摘要	为评估TRMM 3B42( TRMM)和新一代GPM IMERG( GPM)卫星降水产品精度,基于国内824个气象站点日降水数据,选用相关系数( R) 、相对误差( E_R )和公正先兆评分( S_(ET) )等指标,对比分析了二者在中国大陆和九大流域内逐日、逐月尺度的观测精度.研究表明: ①在日尺度上,中国大陆内的GPM降水数据精度整体优于TRMM,二者的R、E_R和S_(ET)分别达到了0.73、2.03%、0.36和0.70、3.75%、0.33; ② GPM和TRMM日降水数据在海河流域、淮河流域、长江流域、珠江流域、东南诸河流域呈现较高的观测精度,在松辽流域、黄河流域、西南诸河片区精度次之,在内陆河片区相对最低; ③在月尺度上,中国大陆内的GPM冬季降水精度明显好于TRMM,这是由于GPM提高了对弱降水和固态降水的观测能力.总体上,GPM降水产品在中国各大流域精度较好且优于TRMM,表明其在流域降水研究及水文模拟中将有较好的应用前景.
英文摘要	For evaluating the accuracy of the remotely sensed precipitation products of Tropical Rainfall Measuring Mission 3B42 ( TRMM) and latest-generation Global Precipitation Measurement IMERG ( GPM) ,four commonly used error metrics ( R,E_)RMS),E_(MA) and E_R ) and four category statistical indexes ( R_(FA),P_(OD),B and S_(ET) ) were adopted to quantify the evaluations on GPM,TRMM products by comparing with the gauged daily precipitation data obtained from the 824 meteorological stations within Mainland China. Evaluations were carried out spatially over the Mainland China and the 9 drainage basins at the daily and monthly temporal scales. The results suggested that: ① The accuracy of GPM generally outperformed TRMM in Mainland China at daily scale,the R,E_R and S_(ET) of GPM and TRMM reached to about 0.73,2.03%,0.36 and 0.70,3.75%,0.33,respectively; ② At daily scale,both GPM and TRMM products exhibited high detection accuracy in the Haihe River basin,the Huaihe River basin,the Yangtze River basin, the Pearl River basin and the Southeast Drainage basins,while the data accuracy in the Songhua and the Liaohe River basin,the Yellow River basin and the Southwest Drainage basins were relatively lower and the detection accuracy in the Inland Drainage basins shown relatively the lowest; ③ As the improved capability of the GPM in detecting light rainfall and solid precipitation significantly benefited the accuracy increase of GPM over Mainland China,GPM performed obviously better than that of TRMM in winter precipitation detections at monthly scale. Overall,as the successor of the TRMM,GPM outperformed TRMM over each drainage basin as well as in whole Mainland China,which implied the great potential of its application in various studies. However,yet rather poor accuracy of the GPM precipitation product in high altitude and arid regions as well as high false alarm ratio for light precipitation over the drainage basins in the Southeast China remained a challenge to improve its IMERG inversion algorithm.
中文关键词	降水量 ; 流域分区 ; 精度评价 ; 分类统计指标
英文关键词	TRMM GPM TRMM GPM precipitation drainage basin accuracy evaluation category statistical index
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6298505
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238248
作者单位	1.中国科学院遥感与数字地球研究所;;中国科学院大学, 中国科学院数字地球重点实验室;;, ;;, 北京;;北京 100094;;100049, 中国; 2.中国科学院遥感与数字地球研究所, 中国科学院数字地球重点实验室, 北京 100094, 中国; 3.南京大学环境学院, 南京, 江苏 210046, 中国
推荐引用方式 GB/T 7714	李麒崙,张万昌,易路,等. GPM与TRMM降水数据在中国大陆的精度评估与对比[J],2018,29(3):303-313.
APA	李麒崙,张万昌,易路,刘金平,&陈豪.(2018).GPM与TRMM降水数据在中国大陆的精度评估与对比.水科学进展,29(3),303-313.
MLA	李麒崙,et al."GPM与TRMM降水数据在中国大陆的精度评估与对比".水科学进展 29.3(2018):303-313.