干旱区生态环境知识资源中心(Arid): Threshold Vegetation Greenness under Water Balance in Different Desert Areas over the Silk Road Economic Belt

Arid

DOI	10.3390/rs12152452
	Threshold Vegetation Greenness under Water Balance in Different Desert Areas over the Silk Road Economic Belt
	Ma, Yu-Jun; Shi, Fang-Zhong; Hu, Xia; Li, Xiao-Yan
通讯作者	Ma, YJ
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2020
卷号	12 期号:15
英文摘要	The sustainability of dryland vegetation growth over the Silk Road Economic Belt is under threat of water shortage, and the determination of water carrying capacity for vegetation is critically essential to balance water supply and water demand for the maintenance of existing ecosystems. To better understand how and why vegetation growth varies in different desert areas, this study first analyzed the spatiotemporal variation of the normalized difference vegetation index (NDVI). Then, we investigated the relationship between NDVI and climatic factors (precipitation, soil water content, air temperature, evapotranspiration), and estimated the threshold NDVI under water balance in different desert areas. Results showed that the higher NDVI was mainly distributed in Kazakhstan, Russia, and Azerbaijan, and it increased in approximately 53% of desert areas from 1982 to 2015 in the whole study region. The mean annual NDVI showed a simultaneous increasing trend in all desert areas from 1982 to 1994, and decreased significantly only in the cold arid desert area (p< 0.01, -0.0067 decade(-1)) or had no significant change in other desert areas after 1994 (p> 0.01). The climate condition generally appeared as a warming and drying trend in the past 34 years, with varied changing rates in different desert areas. NDVI presented a strong positive relationship with both precipitation and evapotranspiration in most desert areas. The threshold values of the mean annual NDVI under water balance between 1982 and 2015 were approximately 0.1041 (hot arid desert), 0.1337 (cold arid desert), 0.1346 (cold arid semi-desert), 0.0951 (hot arid desert semi-desert), 0.0776 (polar desert tundra), 0.1071 (hot arid desert shrub), 0.1377 (cold arid desert steppe), and 0.0701 (polar desert steppe), respectively. The responses of these threshold values to precipitation were all positive in different desert areas. These results provide an enhanced understanding of vegetation dynamics and ecological conservation, which are of great importance to implementing adaptation and mitigation measures for terrestrial ecosystems over the Silk Road Economic Belt.
英文关键词	precipitation evapotranspiration NDVI desert area Silk Road Economic Belt
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000559260200001
WOS关键词	CARRYING-CAPACITY ; SOIL-WATER ; CLIMATE-CHANGE ; CENTRAL-ASIA ; PRECIPITATION ; EVAPOTRANSPIRATION ; TEMPERATURE ; DYNAMICS ; CHINA ; MODIS
WOS类目	Remote Sensing
WOS研究方向	Remote Sensing
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/2XILL650/325605
作者单位	[Ma, Yu-Jun] Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Guangdong, Peoples R China; [Ma, Yu-Jun; Hu, Xia; Li, Xiao-Yan] Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; [Ma, Yu-Jun; Shi, Fang-Zhong; Hu, Xia; Li, Xiao-Yan] Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing 100875, Peoples R China; [Li, Xiao-Yan] Qinghai Normal Univ, Key Lab Tibetan Plateau Land Surface Proc & Ecol, Minist Educ, Xining 810016, Peoples R China
推荐引用方式 GB/T 7714	Ma, Yu-Jun,Shi, Fang-Zhong,Hu, Xia,et al. Threshold Vegetation Greenness under Water Balance in Different Desert Areas over the Silk Road Economic Belt[J]. 北京师范大学,2020,12(15).
APA	Ma, Yu-Jun,Shi, Fang-Zhong,Hu, Xia,&Li, Xiao-Yan.(2020).Threshold Vegetation Greenness under Water Balance in Different Desert Areas over the Silk Road Economic Belt.REMOTE SENSING,12(15).
MLA	Ma, Yu-Jun,et al."Threshold Vegetation Greenness under Water Balance in Different Desert Areas over the Silk Road Economic Belt".REMOTE SENSING 12.15(2020).