气候变化领域集成服务门户(CCPortal): Long-term variations in actual evapotranspiration over the Tibetan Plateau

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DOI	10.5194/essd-13-3513-2021
	Long-term variations in actual evapotranspiration over the Tibetan Plateau
	Han, Cunbo; Ma, Yaoming; Wang, Binbin; Zhong, Lei; Ma, Weiqiang; Chen, Xuelong; Su, Zhongbo
通讯作者	Ma, YM (通讯作者)
发表日期	2021
ISSN	1866-3508
EISSN	1866-3516
起始页码	3513
结束页码	3524
卷号	13 期号:7
英文摘要	Actual terrestrial evapotranspiration (ETa) is a key parameter controlling land-atmosphere interaction processes and water cycle. However, spatial distribution and temporal changes in ETa over the Tibetan Plateau (TP) remain very uncertain. Here we estimate the multiyear (2001-2018) monthly ETa and its spatial distribution on the TP by a combination of meteorological data and satellite products. Validation against data from six eddy-covariance monitoring sites yielded root-mean-square errors ranging from 9.3 to 14.5mm per month and correlation coefficients exceeding 0.9. The domain mean of annual ETa on the TP decreased slightly (-1.45 mm yr(-1), p < 0.05) from 2001 to 2018. The annual ETa increased significantly at a rate of 2.62 mm yr(-1) ( p < 0.05) in the eastern sector of the TP (long > 90 degrees E) but decreased significantly at a rate of 5.52 mm yr(-1) (p < 0.05) in the western sector of the TP (long < 90 degrees E). In addition, the decreases in annual ETa were pronounced in the spring and summer seasons, while almost no trends were detected in the autumn and winter seasons. The mean annual ETa during 2001-2018 and over the whole TP was 496 +/- 23 mm. Thus, the total evapotranspiration from the terrestrial surface of the TP was 1238.3 +/- 57.6 km(3) yr(-1). The estimated ETa product presented in this study is useful for an improved understanding of changes in energy and water cycle on the TP.
关键词	SURFACE-ENERGY-BALANCE HEAT FLUXES SYSTEM SEBS EVAPORATION MODELS
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000674943800002
来源期刊	EARTH SYSTEM SCIENCE DATA
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/260486
推荐引用方式 GB/T 7714	Han, Cunbo,Ma, Yaoming,Wang, Binbin,et al. Long-term variations in actual evapotranspiration over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,13(7).
APA	Han, Cunbo.,Ma, Yaoming.,Wang, Binbin.,Zhong, Lei.,Ma, Weiqiang.,...&Su, Zhongbo.(2021).Long-term variations in actual evapotranspiration over the Tibetan Plateau.EARTH SYSTEM SCIENCE DATA,13(7).
MLA	Han, Cunbo,et al."Long-term variations in actual evapotranspiration over the Tibetan Plateau".EARTH SYSTEM SCIENCE DATA 13.7(2021).