气候变化领域集成服务门户(CCPortal): Detection of hydrological variations and their impacts on vegetation from multiple satellite observations in the Three-River Source Region of the Tibetan Plateau

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DOI	10.1016/j.scitotenv.2018.05.226
	Detection of hydrological variations and their impacts on vegetation from multiple satellite observations in the Three-River Source Region of the Tibetan Plateau
	Xu, Min; Kang, Shichang; Chen, Xuelong; Wu, Hao; Wang, Xiaoyun; Su, Zhongbo
发表日期	2018
ISSN	0048-9697
EISSN	1879-1026
卷号	639
英文摘要	The Three-River Source Region (TRSR) of the Tibetan Plateau (TP) is regarded as the "Chinese water tower". Climate warming and the associated degradation of permafrost might change the water cycle and affect the alpine vegetation growth in the TRSR. However, the quantitative changes in the water budget and their impacts on the vegetation in the TRSR are poorly understood. In this study, the spatial-temporal changes in the hydrological variables and the normalized difference vegetation index (NDVI) during 2003-2014 were investigated using multiple satellite data and a remote sensing energy balance model. The results indicated that precipitation showed an increasing trend at a rate of 14.0 mm 10 a(-1), and evapotranspiration (ET) showed a slight decreasing trend. The GRACE-derived total water storage (TWS) change presented a significant increasing trend at a rate of 35.1 mm a(-1). The change in groundwater (GW) which showed an increasing trend at a rate of 18.5 mm a(-1), was estimated by water budget. The time lag of the GRACE-TWS that was influenced by precipitation was more obviously than was the GLDAS-SM(Soil Moisture) change. The vegetation in the TRSR was greening during the study period, and the accumulation of the NDVI increased rapidly after 2008. The effect of total TWS and GLDAS-SM on vegetation was considerably more than that the effects of other factors in this region. It was concluded that the hydrological cycle had obviously changed and that more soil water was transferred into the GW since the aquiclude changed due to climate warming. The increasing area and number of lakes and the thickening of the active layer in the permafrost area led to the greater infiltration of surface water into the groundwater, which resulted in increased water storage. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Tibetan Plateau Three-River Source Region Hydrological variations Water budget Normalized difference vegetation index (NDVI)
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/111946
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xu, Min,Kang, Shichang,Chen, Xuelong,et al. Detection of hydrological variations and their impacts on vegetation from multiple satellite observations in the Three-River Source Region of the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2018,639.
APA	Xu, Min,Kang, Shichang,Chen, Xuelong,Wu, Hao,Wang, Xiaoyun,&Su, Zhongbo.(2018).Detection of hydrological variations and their impacts on vegetation from multiple satellite observations in the Three-River Source Region of the Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,639.
MLA	Xu, Min,et al."Detection of hydrological variations and their impacts on vegetation from multiple satellite observations in the Three-River Source Region of the Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 639(2018).