globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025418
论文题名:
Ground validation of GPM IMERG and TRMM 3B42V7 rainfall products over southern Tibetan Plateau based on a high-density rain gauge network
作者: Xu R.; Tian F.; Yang L.; Hu H.; Lu H.; Hou A.
刊名: Journal of Geophysical Research: Atmospheres
出版年: 2017
卷: 122, 期:2
起始页码: 910
结束页码: 924
语种: 英语
英文关键词: GPM IMERG ; ground validation ; southern Tibetan Plateau ; TRMM 3B42V7
Scopus关键词: algorithm ; genetic algorithm ; model validation ; network analysis ; precipitation intensity ; rainfall ; raingauge ; TRMM ; China ; Qinghai-Xizang Plateau
英文摘要: The objective of this study is to evaluate two satellite rainfall products Global Precipitation Measurement Integrated MultisatellitE Retrievals and Tropical Rainfall Measuring Mission 3B42V7 (GPM IMERG and TRMM 3B42V7) in southern Tibetan Plateau region, with special focus on the dependence of products' performance on topography and rainfall intensity. Over 500 in situ rain gauges constitute an unprecedentedly dense rain gauge network over this region and provide an exceptional resource for ground validation of satellite rainfall estimates. Our evaluation centers on the rainy season from May to October in 2014. Results indicate that (1) GPM product outperforms TRMM at all spatial scales and elevation ranges in detecting daily rainfall accumulation; (2) rainfall accumulation over the entire rainy season is negatively correlated with mean elevation for rain gauges and the two satellite rainfall products, while the performance of TRMM also significantly correlates with topographic variations; (3) in terms of the ability of rainfall detection, false alarming ratio of TRMM (21%) is larger than that of GPM (14%), while missing ratio of GPM (13%) is larger than that of TRMM (9%). GPM tends to underestimate the amount of light rain events of 0–1 mm/d, while the opposite (overestimation) is true for TRMM. GPM shows better detecting ability for light rainfall (0–5 mm/d) events but there is no detection skill for both GPM and TRMM at high-elevation (>4500 m) regions. Our results not only highlight the superiority of GPM to TRMM in southern Tibetan Plateau region but also recommend that further improvement on the rainfall retrieval algorithm is needed by considering topographical influences for both GPM and TRMM rainfall products. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: 2016YFA0601603 ; 2016YFC0402701 ; 91647205"This study was financially supported by the National Science Foundation of China (91647205), Ministry of Science and Technology of P.R. China (2016YFC0402701), the National Science Foundation of China (51190092), Ministry of Science and Technology of P.R. China (2016YFA0601603) and the foundation of State Key Laboratory of Hydroscience and Engineering of Tsinghua University (2016-KY-03). Rain gauge data are available via contacting the corresponding author (tianfq@tsinghua.edu.cn). We acknowledge three reviewers for their insightful and constructive comments which improve the manuscript substantially.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62731
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Department of Hydraulic Engineering, Tsinghua University, Beijing, China; Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China; Joint Center for Global Change Studies (JCGCS), Beijing, China; Hydrology Bureau, Ministry of Water Resources, Beijing, China

Recommended Citation:
Xu R.,Tian F.,Yang L.,et al. Ground validation of GPM IMERG and TRMM 3B42V7 rainfall products over southern Tibetan Plateau based on a high-density rain gauge network[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)
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