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DOI	10.1016/j.jhydrol.2016.04.006
	A worldwide evaluation of basin-scale evapotranspiration estimates against the water balance method
	Liu, Wenbin; Wang, Lei; Zhou, Jing; Li, Yanzhong; Sun, Fubao; Fu, Guobin; Li, Xiuping; Sang, Yan-Fang
通讯作者	Wang, L (通讯作者)
发表日期	2016
ISSN	0022-1694
EISSN	1879-2707
起始页码	82
结束页码	95
卷号	538
英文摘要	Evapotranspiration (ET) plays a critical role in linking the water and energy cycles but is difficult to estimate at regional and basin scales. In this study, we present a worldwide evaluation of nine ET products (three diagnostic products, three land surface model (LSM) simulations and three reanalysis-based products) against reference ET (ETWb) calculated using the water balance method corrected for the water storage change at an annual time scale over the period 1983-2006 for 35 global river basins. The results indicated that there was no significant intra-category discrepancy in the annual ET estimates for the 35 basins calculated using the different products in 35 basins, but some products performed better than others, such as the Global Land surface Evaporation estimated using the Amsterdam Methodology (GLEAM_E) in the diagnostic products, ET obtained from the Global Land Data Assimilation System version 1 (GLDAS 1) with the Community Land Model scheme (GCLM_E) in LSM simulations, and ET from the National Aeronautics and Space Administration (NASA) Modern Era Retrospective-analysis for Research and Applications reanalysis dataset (MERRA_E) in the reanalysis-based products. Almost all ET products (except MERRA_E) reasonably estimated the annual means (especially in the dry basins) but systematically underestimated the inter-annual variability (except for MERRA_E, GCLM_E and ET simulation from the GLDAS 1 with the MOSAIC scheme - GMOS_E) and could not adequately estimate the trends (e.g. GCLM_E and MERRA_E) of ETwb, (especially in the energy-limited wet basins). The uncertainties in nine ET products may be primarily attributed to the discrepancies in the forcing datasets and model structural limitations. The enhancements of global forcing data (meteorological data, solar radiation, soil moisture stress and water storage changes) and model physics (reasonable consideration of the water and energy balance and vegetation processes such as canopy interception loss) will undoubtedly improve the estimation of global ET in the future. (C) 2016 The Authors. Published by Elsevier B.V.
关键词	TERRESTRIAL EVAPOTRANSPIRATION REGIONAL EVAPOTRANSPIRATION COMPLEMENTARY RELATIONSHIP GROUNDWATER RECHARGE RIVER-BASINS GRACE EVAPORATION PRECIPITATION STORAGE MODIS
英文关键词	Global ET products; Water balance method; Koppen climate classification; Global Land Data Assimilation System; GRACE
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:000378360600008
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258675
推荐引用方式 GB/T 7714	Liu, Wenbin,Wang, Lei,Zhou, Jing,et al. A worldwide evaluation of basin-scale evapotranspiration estimates against the water balance method[J]. 中国科学院青藏高原研究所,2016,538.
APA	Liu, Wenbin.,Wang, Lei.,Zhou, Jing.,Li, Yanzhong.,Sun, Fubao.,...&Sang, Yan-Fang.(2016).A worldwide evaluation of basin-scale evapotranspiration estimates against the water balance method.JOURNAL OF HYDROLOGY,538.
MLA	Liu, Wenbin,et al."A worldwide evaluation of basin-scale evapotranspiration estimates against the water balance method".JOURNAL OF HYDROLOGY 538(2016).