干旱区生态环境知识资源中心(Arid): Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia

Arid

DOI	10.3390/rs12101665
	Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia
	Tai, Xiaoli 1,2; Epstein, Howard E.2; Li, Bo 1
通讯作者	Li, Bo
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2020
卷号	12 期号:10
英文摘要	Mountain-basin systems (MBS) in Central Asia are unique and complex ecosystems, wherein their elevation gradients lead to high spatial heterogeneity in vegetation and its response to climate change. Exploring elevation-dependent vegetation greenness variation and the effects of climate factors on vegetation has important theoretical and practical significance for regulating the ecological processes of this system. Based on the MODIS NDVI (remotely sensed normalized difference vegetation index), and observed precipitation and temperature data sets, we analyzed vegetation greenness and climate patterns and dynamics with respect to elevation (300-3600 m) in a typical MBS, in Altay Prefecture, China, during 2000-2017. Results showed that vegetation exhibited a greening (NDVI) trend for the whole region, as well as the mountain, oasis and desert zones, but only the desert zone reached significant level. Vegetation in all elevation bins showed greening, with significant trends at 400-700 m and 2600-3500 m. In summer, lower elevation bins (below 1500 m) had a nonsignificant wetting and warming trend and higher elevation bins had a nonsignificant drying and warming trend. Temperature trend increased with increasing elevation, indicating that warming was stronger at higher elevations. In addition, precipitation had a significantly positive coefficient and temperature a nonsignificant coefficient with NDVI at both regional scale and subregional scale. Our analysis suggests that the regional average could mask or obscure the relationship between climate and vegetation at elevational scale. Vegetation greenness had a positive response to precipitation change in all elevation bins, and had a negative response to temperature change at lower elevations (below 2600 m), and a positive response to temperature change at higher elevations. We observed that vegetation greenness was more sensitive to precipitation than to temperature at lower elevations (below 2700 m), and was more sensitive to temperature at higher elevations.
英文关键词	mountain-basin system elevation vegetation greenness climate change MODIS NDVI
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000543394800132
WOS关键词	QINGHAI-TIBETAN PLATEAU ; LEAF-AREA INDEX ; DYNAMICS ; IMPACTS ; PRECIPITATION ; XINJIANG ; TRENDS ; COVER ; REGIONS ; CHINA
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
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/2XILL650/319753
作者单位	1.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China; 2.Univ Virginia, Dept Environm Sci, Clark Hall, Charlottesville, VA 22903 USA
推荐引用方式 GB/T 7714	Tai, Xiaoli,Epstein, Howard E.,Li, Bo. Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia[J]. 北京师范大学,2020,12(10).
APA	Tai, Xiaoli,Epstein, Howard E.,&Li, Bo.(2020).Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia.REMOTE SENSING,12(10).
MLA	Tai, Xiaoli,et al."Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia".REMOTE SENSING 12.10(2020).