干旱区生态环境知识资源中心(Arid): Spatial heterogeneity of changes in vegetation growth and their driving forces based on satellite observations of the Yarlung Zangbo River Basin in the Tibetan Plateau

Arid

DOI	10.1016/j.jhydrol.2019.04.043
	Spatial heterogeneity of changes in vegetation growth and their driving forces based on satellite observations of the Yarlung Zangbo River Basin in the Tibetan Plateau
	Sun, Wenchao 1; Wang, Yuanyuan 1; Fu, Yongshuo H.1,2; Xue, Baolin 1; Wang, Guoqiang 1; Yu, Jingshan 1; Zuo, Depeng 1; Xu, Zongxue 1
通讯作者	Sun, Wenchao ; Wang, Guoqiang
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	574 页码:324-332
英文摘要	Changes in vegetation growth may influence the availability of water resources. Located on the Tibetan Plateau, the Yarlung Zangbo River Basin (YZRB) is a major freshwater source for Tibet, China and downstream South Asian countries, with high spatial heterogeneity in altitude and climate from the upstream to downstream regions. In this study, we combined satellite-based gridded datasets of the normalized difference vegetation index (NDVI), topography, precipitation, and temperature to investigate how vegetation growth has changed in the YZRB over recent decades (1982-2010), and to determine their driving mechanisms. Although a statistically significant trend in growing season NDVI was not detected at the basin scale, at the pixel scale 16.8% and 5.3% of the area of the YZRB was found to exhibit increasing and decreasing trends, respectively. The greatest increases occurred in the Nyang subbasin. Variations of NDVI values along elevation, precipitation, and temperature gradients revealed the greatest variation over the middle ranges of the three variables. Partial correlation analyses indicate that in both arid and semi-arid regions of the YZRB precipitation is positively correlated with NDVI. The relationship between NDVI and temperature varies with aridity, reflecting different effects of snow-melting processes on vegetation growth. Temperature positively correlates with NDVI in the arid region. In addition, a negative correlation between NDVI and temperature is detected in the semi-arid region. This is the first comprehensive study to explore climate-vegetation-hydrology relationships in the YZRB at a spatial resolution finer than those derived from sparse in-situ meteorological stations or low resolution global climate datasets. Our results are valuable for understanding ecohydrological processes in both arid and semi-arid regions of this internationally important river basin.
英文关键词	Yarlung Zangbo River Basin Vegetation changes Normalized difference vegetation index Elevation Precipitation Temperature
类型	Article
语种	英语
国家	Peoples R China ; Belgium
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000476962800027
WOS关键词	CLIMATE CHANGES ; PLANT-GROWTH ; PRECIPITATION ; CARBON ; VARIABILITY ; GRADIENT ; NITROGEN ; RUNOFF
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217162
作者单位	1.Beijing Normal Univ, Coll Water Sci, Beijing Key Lab Urban Hydrol Cycle & Sponge City, Xinjiekouwai St 19, Beijing 100875, Peoples R China; 2.Univ Antwerp, Dept Biol, Univ Pl 1, BE-2610 Antwerp, Belgium
推荐引用方式 GB/T 7714	Sun, Wenchao,Wang, Yuanyuan,Fu, Yongshuo H.,et al. Spatial heterogeneity of changes in vegetation growth and their driving forces based on satellite observations of the Yarlung Zangbo River Basin in the Tibetan Plateau[J]. 北京师范大学,2019,574:324-332.
APA	Sun, Wenchao.,Wang, Yuanyuan.,Fu, Yongshuo H..,Xue, Baolin.,Wang, Guoqiang.,...&Xu, Zongxue.(2019).Spatial heterogeneity of changes in vegetation growth and their driving forces based on satellite observations of the Yarlung Zangbo River Basin in the Tibetan Plateau.JOURNAL OF HYDROLOGY,574,324-332.
MLA	Sun, Wenchao,et al."Spatial heterogeneity of changes in vegetation growth and their driving forces based on satellite observations of the Yarlung Zangbo River Basin in the Tibetan Plateau".JOURNAL OF HYDROLOGY 574(2019):324-332.