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DOI	10.1016/j.jhydrol.2021.127223
	Uncertainties in partitioning evapotranspiration by two remote sensing-based models
	Chen, Huiling; Zhu, Gaofeng; Shang, Shasha; Qin, Wenhua; Zhang, Yang; Su, Yonghong; Zhang, Kun; Zhu, Yongtai; Xu, Cong
通讯作者	Zhu, GF (通讯作者)，Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0022-1694
EISSN	1879-2707
卷号	604
英文摘要	Accurate estimation of evapotranspiration (ET) and the partitioning of ET into transpiration (Tr), soil evaporation (Es) and interception (Ei) is critical to understand water cycle and land-atmosphere feedback. In this study, we evaluated the performances of two remote sensing-based ET models at multiple scales, and analyzed the uncertainties in ET partitioning due to the model structures. These two models were Simple Terrestrial Hydrosphere Model (SiTH) developed by our team and the Global Land Evaporation Amsterdam Model (GLEAM). As far as ET were concerned, the two models exhibited relatively good performances at different scales. However, it was found that GLEAM performed relatively poor at evergreen broadleaf forest (R2 = 0.34; RMSE = 0.87 mm day- 1; NSE = -0.28). In addition, the seasonal pattern of simulated ET by GLEAM at the tropical rainforest was not consistent with the observations. Furthermore, great discrepancies in ET partitioning were observed between the two models. Generally, GLEAM tended to underestimate Es (slope = 0.02; R2 = 0.004), and overestimate Tr (slope = 1.51; R2 = 0.78) compared to the observations. The underestimations of Es by GLEAM may partly be due to the ignorance of soil evaporation under vegetation canopy. On the contrary, SiTH displayed relatively good performances in estimations of Es (slope = 0.76; R2 = 0.62) and Tr (slope = 0.98; R2 = 0.51). However, both of the two models failed to properly simulate Ei, although GLEAM (slope = 0.55; R2 = 0.83) performed slightly better than SiTH (slope = 0.40; R2 = 0.95). Global multi-year average ratios of Tr, Es, and Ei to ET for GLEAM and SiTH were 0.76, 0.09, 0.15 and 0.67, 0.25, 0.08 respectively. In future studies, it is important to investigate direct observations on different components of ET, especially on the interception, to improve our understanding on the ET processes.
关键词	CARBON-DIOXIDE EXCHANGE NET ECOSYSTEM EXCHANGE SOIL-WATER BUDGET EDDY COVARIANCE INTERANNUAL VARIABILITY RAINFALL INTERCEPTION OLD-GROWTH CANOPY TRANSPIRATION VEGETATION CONTROL SPATIAL-PATTERNS
英文关键词	Evapotranspiration; Partitioning; Interception; Soil evaporation; Transpiration
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000752009700004
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254547
作者单位	[Chen, Huiling; Zhu, Gaofeng; Shang, Shasha; Qin, Wenhua; Zhang, Yang; Zhu, Yongtai; Xu, Cong] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China; [Su, Yonghong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Zhang, Kun] Univ Hong Kong, Sch Biol Sci, Hong Kong, Peoples R China; [Zhang, Kun] Univ Hong Kong, Dept Math, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Chen, Huiling,Zhu, Gaofeng,Shang, Shasha,et al. Uncertainties in partitioning evapotranspiration by two remote sensing-based models[J]. 中国科学院西北生态环境资源研究院,2022,604.
APA	Chen, Huiling.,Zhu, Gaofeng.,Shang, Shasha.,Qin, Wenhua.,Zhang, Yang.,...&Xu, Cong.(2022).Uncertainties in partitioning evapotranspiration by two remote sensing-based models.JOURNAL OF HYDROLOGY,604.
MLA	Chen, Huiling,et al."Uncertainties in partitioning evapotranspiration by two remote sensing-based models".JOURNAL OF HYDROLOGY 604(2022).