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	Validation of TRMM 3B42V7 Rainfall Product under Complex Topographic and Climatic Conditions over Hexi Region in the Northwest Arid Region of China
	Wang, Xiuna1,2; Ding, Yongjian1,2,3; Zhao, Chuancheng1,4; Wang, Jian5
刊名	WATER
	2018-08-01
卷号	10期号:8页码:26
关键词	TRMM 3B42V7 accuracy evaluation bias correction complex terrain climatic transitional zone northwest arid region
ISSN号	2073-4441
DOI	10.3390/w10081006
通讯作者	Ding, Yongjian(dyj@lzb.ac.cn)
英文摘要	Continuous and accurate spatiotemporal precipitation data plays an important role in regional climate and hydrology research, particularly in the arid inland regions where rain gauges are sparse and unevenly distributed. The main objective of this study is to evaluate and bias-correct the Tropical Rainfall Measuring Mission (TRMM) 3B42V7 rainfall product under complex topographic and climatic conditions over the Hexi region in the northwest arid region of China with the reference of rain gauge observation data during 2009-2015. A series of statistical indicators were adopted to quantitatively evaluate the error of 3B42V7 and its ability in detecting precipitation events. Overall, the 3B42V7 overestimates the precipitation with Bias of 11.16%, and its performance generally becomes better with the increasing of time scale. The agreements between the rain gauge data and 3B42V7 are very low in cold season, and moderate in warm season. The 3B42V7 shows better correlation with rain gauges located in the southern mountainous and central oasis areas than in the northern extreme arid regions, and is more likely to underestimate the precipitation in high-altitude mountainous areas and overestimate the precipitation in low-elevation regions. The distribution of the error on the daily scale is more related to the elevation and rainfall than in monthly and annual scale. The 3B42V7 significantly overestimates the precipitation events, and the overestimation mainly focuses on tiny amounts of rainfall (0-1 mm/d), which is also the range of false alarm concentration. Bias correction for 3B42V7 was carried out based on the deviation of the average monthly precipitation data during 2009-2015. The bias-corrected 3B42V7 was significantly improved compared with the original product. Results suggest that regional assessment and bias correction of 3B42V7 rainfall product are of vital importance and will provide substantive reference for regional hydrological studies.
收录类别	SCI
WOS关键词	MULTISATELLITE PRECIPITATION ANALYSIS ; HIGH-RESOLUTION SATELLITE ; DISTRIBUTED HYDROLOGICAL MODEL ; INLAND RIVER-BASINS ; UPPER BLUE NILE ; BIAS CORRECTION ; TIBETAN PLATEAU ; WATER-RESOURCES ; ANALYSIS TMPA ; YELLOW-RIVER
WOS研究方向	Water Resources
WOS类目	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000448462700040
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558271
专题	寒区旱区环境与工程研究所
通讯作者	Ding, Yongjian
作者单位	1.Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 4.Lanzhou City Univ, Dept Geog & Environm Engn, Lanzhou 730000, Gansu, Peoples R China 5.Yancheng Teachers Univ, Sch Urban & Planning, Yancheng 224002, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiuna,Ding, Yongjian,Zhao, Chuancheng,et al. Validation of TRMM 3B42V7 Rainfall Product under Complex Topographic and Climatic Conditions over Hexi Region in the Northwest Arid Region of China[J]. WATER,2018,10(8):26.
APA	Wang, Xiuna,Ding, Yongjian,Zhao, Chuancheng,&Wang, Jian.(2018).Validation of TRMM 3B42V7 Rainfall Product under Complex Topographic and Climatic Conditions over Hexi Region in the Northwest Arid Region of China.WATER,10(8),26.
MLA	Wang, Xiuna,et al."Validation of TRMM 3B42V7 Rainfall Product under Complex Topographic and Climatic Conditions over Hexi Region in the Northwest Arid Region of China".WATER 10.8(2018):26.

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