干旱区生态环境知识资源中心(Arid): Characterization of elevation and land cover dependent trends of NDVI variations in the Hexi region, northwest China

Arid

DOI	10.1016/j.jenvman.2018.11.069
	Characterization of elevation and land cover dependent trends of NDVI variations in the Hexi region, northwest China
	Han, Jing-Cheng 1; Huang, Yuefei 1,2,3; Zhang, Hua 4; Wu, Xiaofeng 1
通讯作者	Huang, Yuefei
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2019
卷号	232 页码:1037-1048
英文摘要	In the arid Hexi Corridor of northwest China, vegetation cover plays a pivotal role in sustaining the unique terrestrial ecosystem. In this paper, vegetation changes during growth season from April to October were investigated through examining the trends in the Normalized Difference Vegetation Index (NDVI) across the Hexi region. Based on the GMMIS NDVI 3g.v1 dataset, NDVI trend and its dependency on elevation and land cover were analyzed for the period 1982-2015 according to multiple statistical tests. Results showed that NDVI exhibited a significantly increasing trend in similar to 70% of the vegetated area, in contrast with a negative trend only in 2.85%. The resulting distinct groups with respect to decreasing, increasing and no trends presented significant differences in elevation and land cover composition, and the correlation between elevation, land cover and NDVI trend magnitude was subjected to precipitation and temperature change. The elevation and grassland cover were found to mainly account for variations in NDVI trend, and increase in elevation and various types of land cover excluding impervious and bare land would facilitate the trend magnitude. The dependency of NDVI trend on elevation and land cover was very vulnerable to increasing air temperature, which triggered an improvement in the vegetable activity to adapt to climate change, especially grass and forest. The contribution of crop and shrub to NDVI change was sensitive to precipitation trend change, but the crop was primarily influenced by human activities. The identified patterns of vegetation change would help to gain insights into the adapting mechanism of the fragile ecosystems in arid areas to changing environmental conditions.
英文关键词	NDVI trend Climate change Elevation Land cover Precipitation Temperature
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000459845200113
WOS关键词	CLIMATE-CHANGE ; ECOLOGICAL RESPONSES ; VEGETATION ; DYNAMICS ; CORRIDOR ; IMPACTS ; SIMULATIONS ; PHENOLOGY ; RAINFALL ; DROUGHT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216957
作者单位	1.Tsinghua Univ, Water Res Ctr, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China; 2.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China; 3.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Qinghai, Peoples R China; 4.Texas A&M Univ Corpus Christi, Sch Engn & Comp Sci, Coll Sci & Engn, Corpus Christi, TX 78412 USA
推荐引用方式 GB/T 7714	Han, Jing-Cheng,Huang, Yuefei,Zhang, Hua,et al. Characterization of elevation and land cover dependent trends of NDVI variations in the Hexi region, northwest China[J]. 清华大学,2019,232:1037-1048.
APA	Han, Jing-Cheng,Huang, Yuefei,Zhang, Hua,&Wu, Xiaofeng.(2019).Characterization of elevation and land cover dependent trends of NDVI variations in the Hexi region, northwest China.JOURNAL OF ENVIRONMENTAL MANAGEMENT,232,1037-1048.
MLA	Han, Jing-Cheng,et al."Characterization of elevation and land cover dependent trends of NDVI variations in the Hexi region, northwest China".JOURNAL OF ENVIRONMENTAL MANAGEMENT 232(2019):1037-1048.