干旱区生态环境知识资源中心(Arid): Comparison of Traditional Method and Triple Collocation Analysis for Evaluation of Multiple Gridded Precipitation Products across Germany

Arid

DOI	10.1175/JHM-D-21-0049.1
	Comparison of Traditional Method and Triple Collocation Analysis for Evaluation of Multiple Gridded Precipitation Products across Germany
	Duan, Zheng; Duggan, Edward; Chen, Cheng; Gao, Hongkai; Dong, Jianzhi; Liu, Junzhi
通讯作者	Gao, HK (corresponding author)，East China Normal Univ, Key Lab Geog Informat Sci, Minist Educ China, Shanghai, Peoples R China.
来源期刊	JOURNAL OF HYDROMETEOROLOGY
ISSN	1525-755X
EISSN	1525-7541
出版年	2021
卷号	22 期号:11
英文摘要	Evaluating the accuracy of precipitation products is essential for many applications. The traditional method for evaluation is to calculate error metrics of products with gauge measurements that are considered as ground truth. The multiplicative triple collocation (MTC) method has been demonstrated powerful in error quantification of precipitation products when ground truth is not known. This study applied MTC to evaluate five precipitation products in Germany: two raw satellite-based products (CMORPH and PERSIANN), one reanalysis product (ERA-Interim), one soil moisture-based product (SM2RAIN-ASCAT), and one gauge-based product (REGNIE). Evaluation was performed at the 0.5 degrees daily spatial-temporal scales. MTC involves a log transformation of data, necessitating dealing with zero values in daily precipitation. Effects of 12 different strategies for dealing with zero values on MTC results were investigated. Seven different triplet combinations were tested to evaluate the stability of MTC. Results showed that different strategies for replacing zero values had considerable effects on MTC-derived error metrics, particularly for root-mean-square error (RMSE). MTC with different triplet combinations generated different error metrics for individual products. The MTC-derived correlation coefficient (CC) was more reliable than RMSE. It is more appropriate to use MTC to compare the relative accuracy of different precipitation products. Based on CC with unknown truth, MTC with different triplet combinations produced the same ranking of products as the traditional method. A comparison of results from MTC and the classic TC with additive error model showed the potential limitation of MTC in arid areas or dry time periods with a large ratio of zero daily precipitation.
英文关键词	Rainfall Remote sensing Satellite observations Error analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000741779600001
WOS关键词	GLOBAL PRECIPITATION ; RAIN-GAUGE ; AMSR-E ; MODEL ; UNCERTAINTY ; ERRORS ; SOIL ; PERFORMANCE ; VALIDATION ; MODIS
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375874
作者单位	[Duan, Zheng] Lund Univ, Dept Phys Geog & Ecosyst Sci, Lund, Sweden; [Duggan, Edward] Tech Univ Munich, Chair Hydrol & River Basin Management, Munich, Germany; [Chen, Cheng] Nanjing Hydraul Res Inst, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Peoples R China; [Chen, Cheng] Nanjing Hydraul Res Inst, Ctr Ecoenvironm Res, Nanjing, Peoples R China; [Gao, Hongkai] East China Normal Univ, Key Lab Geog Informat Sci, Minist Educ China, Shanghai, Peoples R China; [Dong, Jianzhi] MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA; [Liu, Junzhi] Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Peoples R China; [Liu, Junzhi] Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Duan, Zheng,Duggan, Edward,Chen, Cheng,et al. Comparison of Traditional Method and Triple Collocation Analysis for Evaluation of Multiple Gridded Precipitation Products across Germany[J],2021,22(11).
APA	Duan, Zheng,Duggan, Edward,Chen, Cheng,Gao, Hongkai,Dong, Jianzhi,&Liu, Junzhi.(2021).Comparison of Traditional Method and Triple Collocation Analysis for Evaluation of Multiple Gridded Precipitation Products across Germany.JOURNAL OF HYDROMETEOROLOGY,22(11).
MLA	Duan, Zheng,et al."Comparison of Traditional Method and Triple Collocation Analysis for Evaluation of Multiple Gridded Precipitation Products across Germany".JOURNAL OF HYDROMETEOROLOGY 22.11(2021).