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	Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers
	Yang Zhaoping2; Gao Jixi2; Zhou Caiping1; Shi Peili1; Zhao Lin3; Shen Wenshou2; Ouyang Hua1
刊名	JOURNAL OF GEOGRAPHICAL SCIENCES
	2011-12-01
卷号	21期号:6页码:979-993
关键词	source regions of the Yangtze and Yellow rivers NDVI spatio-temporal change temperature precipitation shallow ground temperature
ISSN号	1009-637X
DOI	10.1007/s11442-011-0894-x
通讯作者	Ouyang Hua(houyang@icimod.org)
英文摘要	The source regions of the Yangtze and Yellow rivers are important water conservation areas of China. In recent years, ecological deterioration trend of the source regions caused by global climate change and unreasonable resource development increased gradually. In this paper, the spatial distribution and dynamic change of vegetation cover in the source regions of the Yangtze and Yellow rivers are analyzed in recent 10 years based on 1-km resolution multi-temporal SPOTVGT-DN data from 1998 to 2007. Meanwhile, the correlation relationships between air temperature, precipitation, shallow ground temperature and NDVI, which is 3x3 pixel at the center of Wudaoliang, Tuotuohe, Qumalai, Maduo, and Dari meteorological stations were analyzed. The results show that the NDVI values in these two source regions are increasing in recent 10 years. Spatial distribution of NDVI which was consistent with hydrothermal condition decreased from southeast to northwest of the source regions. NDVI with a value over 0.54 was mainly distributed in the southeastern source region of the Yellow River, and most NDVI values in the northwestern source region of the Yangtze River were less than 0.22. Spatial changing trend of NDVI has great difference and most parts in the source regions of the Yangtze and Yellow rivers witnessed indistinct change. The regions with marked increasing trend were mainly distributed on the south side of the Tongtian River, some part of Keqianqu, Tongtian, Chumaer, and Tuotuo rivers in the source region of the Yangtze River and Xingsuhai, and southern Dari county in the source region of the Yellow River. The regions with very marked increasing tendency were mainly distributed on the south side of Tongtian Rriver and sporadically distributed in hinterland of the source region of the Yangtze River. The north side of Tangula Range in the source region of the Yangtze River and Dari and Maduo counties in the source region of the Yellow River were areas in which NDVI changed with marked decreasing tendency. The NDVI change was positively correlated with average temperature, precipitation and shallow ground temperature. Shallow ground temperature had the greatest effect on NDVI change, and the second greatest factor influencing NDVI was average temperature. The correlation between NDVI and shallow ground temperature in the source regions of the Yangtze and Yellow rivers increased significantly with the depth of soil layer.
收录类别	SCI
WOS关键词	CARBON STORAGE ; VEGETATION ; PERMAFROST ; TUNDRA ; THERMOKARST ; DYNAMICS ; NUTRIENT ; IMPACT ; CHINA
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000295575900002
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556542
专题	寒区旱区环境与工程研究所
通讯作者	Ouyang Hua
作者单位	1.CAS, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Minist Environm Protect, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China 3.CAS, CAREERI, Observat & Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yang Zhaoping,Gao Jixi,Zhou Caiping,et al. Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2011,21(6):979-993.
APA	Yang Zhaoping.,Gao Jixi.,Zhou Caiping.,Shi Peili.,Zhao Lin.,...&Ouyang Hua.(2011).Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers.JOURNAL OF GEOGRAPHICAL SCIENCES,21(6),979-993.
MLA	Yang Zhaoping,et al."Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers".JOURNAL OF GEOGRAPHICAL SCIENCES 21.6(2011):979-993.

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