气候变化领域集成服务门户(CCPortal): Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau

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DOI	10.5194/hess-20-3167-2016
	Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau
	Peng, Jian; Loew, Alexander; Chen, Xuelong; Ma, Yaoming; Su, Zhongbo
通讯作者	Peng, J (通讯作者)
发表日期	2016
ISSN	1027-5606
EISSN	1607-7938
起始页码	3167
结束页码	3182
卷号	20 期号:8
英文摘要	The Tibetan Plateau (TP) plays a major role in regional and global climate. The understanding of latent heat (LE) flux can help to better describe the complex mechanisms and interactions between land and atmosphere. Despite its importance, accurate estimation of evapotranspiration (ET) over the TP remains challenging. Satellite observations allow for ET estimation at high temporal and spatial scales. The purpose of this paper is to provide a detailed cross-comparison of existing ET products over the TP. Six available ET products based on different approaches are included for comparison. Results show that all products capture the seasonal variability well with minimum ET in the winter and maximum ET in the summer. Regarding the spatial pattern, the High resOlution Land Atmosphere surface Parameters from Space (HOLAPS) ET demonstrator dataset is very similar to the LandFlux-EVAL dataset (a benchmark ET product from the Global Energy and Water Cycle Experiment), with decreasing ET from the south-east to northwest over the TP. Further comparison against the LandFlux-EVAL over different sub-regions that are decided by different intervals of normalised difference vegetation index (NDVI), precipitation, and elevation reveals that HOLAPS agrees best with LandFlux-EVAL having the highest correlation coefficient (R) and the lowest root mean square difference (RMSD). These results indicate the potential for the application of the HOLAPS demonstrator dataset in understanding the land-atmosphere-biosphere interactions over the TP. In order to provide more accurate ET over the TP, model calibration, high accuracy forcing dataset, appropriate in situ measurements as well as other hydrological data such as runoff measurements are still needed.
关键词	SURFACE-ENERGY-BALANCE GLOBAL TERRESTRIAL EVAPOTRANSPIRATION MODIS TOA RADIANCES WACMOS-ET PROJECT HETEROGENEOUS LANDSCAPE CLIMATE-CHANGE EVAPORATIVE FRACTION HEAT FLUXES SYSTEM SEBS LAKE BASIN
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000383135900001
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
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/258799
推荐引用方式 GB/T 7714	Peng, Jian,Loew, Alexander,Chen, Xuelong,et al. Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,20(8).
APA	Peng, Jian,Loew, Alexander,Chen, Xuelong,Ma, Yaoming,&Su, Zhongbo.(2016).Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau.HYDROLOGY AND EARTH SYSTEM SCIENCES,20(8).
MLA	Peng, Jian,et al."Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau".HYDROLOGY AND EARTH SYSTEM SCIENCES 20.8(2016).