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Can Indirect Evaluation Methods and Their Fusion Products Reduce Uncertainty in Actual Evapotranspiration Estimates?

文献类型：期刊论文

作者Shao, Xingmin1,3; Zhang, Yongqiang3; Liu, Changming3; Chiew, Francis H. S.2; Tian, Jing3; Ma, Ning3; Zhang, Xuanze3
刊名WATER RESOURCES RESEARCH
出版日期2022-06-01
卷号58期号:6页码:21
关键词evapotranspiration global climate change basin uncertainty ensemble
ISSN号0043-1397
DOI10.1029/2021WR031069
通讯作者Zhang, Yongqiang(zhangyq@igsnrr.ac.cn) ; Ma, Ning(ningma@igsnrr.ac.cn)
英文摘要Accurately estimating actual evapotranspiration (ET) across global land surface is one of the key challenges in terrestrial hydrological cycles and energy flux balance studies. Gridded ET products have the potential for application in ungauged basins, but their uncertainties are possibly large and it remains unclear which one is best for a given basin. The water balance (WB) method provides a direct estimate of basin scale ET, but it cannot be used in ungauged basins where streamflow data are unavailable. Here, we first assess the performance of ET from 10 global ET products against WB ET estimates in 43 large river basins. The paper then uses three indirect evaluation methods [Three Cornered Hat (TCH), Arithmetic Average (AA), and Bayesian Three Cornered Hat] to identify the optimal ET products without the need of prior information, and to generate fusion products combining the ET from multiple products. Using the evaluation results derived from the WB method as the reference, the results show that the three methods have great success in identifying poorer products, suggesting that they are useful in filtering poor ET products in applications. However, the ability of such methods in identifying better ET products degrades slightly. The AA fusion product, which combines ET outputs from multiple products, is marginally better than the best single ET product in many of the 43 basins. Because of its simplicity, it could be used to reduce the uncertainty in ET estimates from multiple products for ungauged basins and regions.
WOS关键词TERRESTRIAL EVAPOTRANSPIRATION ; GLOBAL EVAPOTRANSPIRATION ; LAND EVAPORATION ; MODIS ; IMPACT ; FLUX ; PARAMETERIZATION ; DEGRADATION ; VARIABILITY ; MULTIMODEL
资助项目Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0208] ; Talents Program of Chinese Academy of Science ; National Natural Science Foundation of China[41971032] ; Science for a Better Development of Inner Mongolia Program of the Bureau of Science and Technology of the Inner Mongolia Province[KJXM-EEDS-2020005]
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
语种英语
WOS记录号WOS:000806766400001
出版者AMER GEOPHYSICAL UNION
资助机构Second Tibetan Plateau Scientific Expedition and Research Program ; Talents Program of Chinese Academy of Science ; National Natural Science Foundation of China ; Science for a Better Development of Inner Mongolia Program of the Bureau of Science and Technology of the Inner Mongolia Province
源URL[http://ir.igsnrr.ac.cn/handle/311030/179109]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Yongqiang; Ma, Ning
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.CSIRO, Land & Water, Canberra, ACT, Australia
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Shao, Xingmin,Zhang, Yongqiang,Liu, Changming,et al. Can Indirect Evaluation Methods and Their Fusion Products Reduce Uncertainty in Actual Evapotranspiration Estimates?[J]. WATER RESOURCES RESEARCH,2022,58(6):21.
APA Shao, Xingmin.,Zhang, Yongqiang.,Liu, Changming.,Chiew, Francis H. S..,Tian, Jing.,...&Zhang, Xuanze.(2022).Can Indirect Evaluation Methods and Their Fusion Products Reduce Uncertainty in Actual Evapotranspiration Estimates?.WATER RESOURCES RESEARCH,58(6),21.
MLA Shao, Xingmin,et al."Can Indirect Evaluation Methods and Their Fusion Products Reduce Uncertainty in Actual Evapotranspiration Estimates?".WATER RESOURCES RESEARCH 58.6(2022):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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