干旱区生态环境知识资源中心(Arid): Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades

Arid

	Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades
	Li Ruiqing; Gao Yanhong; Chen Deliang; Zhang Yongxin; Li Suosuo
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2018
卷号	10 期号:6 页码:482-492
英文摘要	An overall greening over the Tibetan Plateau (TP) in recent decades has been established through analyses of remotely sensed Normalized Difference Vegetation Index (NDVI), though the regional pattern of the changes and associated drivers remain to be explored. This study used a satellite Leaf Area Index (LAI) dataset (the GLASS LAI dataset) and examined vegetation changes in humid and arid regions of the TP during 1982-2012. Based on distributions of the major vegetation types, the TP was divided roughly into a humid southeastern region dominated by meadow and a dry northwestern region covered mainly by steppe. It was found that the dividing line between the two regions corresponded well with the lines of mean annual precipitation of 400 mm and the mean LAI of 0.3. LAI=0.3 was subsequently used as a threshold for investigating vegetation type changes at the interanual and decadal time scales: if LAI increased from less than 0.3 to greater than 0.3 from one time period to the next, it was regarded as a change from steppe to meadow, and vice versa. The analysis shows that changes in vegetation types occurred primarily around the dividing line of the two regions, with clear growth (reduction) of the area covered by meadow (steppe), in consistency with the findings from using another independent satellite product. Surface air temperature and precipitation (diurnal temperature range) appeared to contribute positively (negatively) to this change though climate variables displayed varying correlation with LAI for different time periods and different regions.
英文关键词	Tibetan Plateau vegetation change leaf area index climate change
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6406889
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336054
作者单位	Li Ruiqing, Northwest Institute of Ecoenvironment and Resources, Chinese Academy of Sciences;;Inner Mongolia Autonomous Regional Meteorological Observatory, Key Laboratory of Land-surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences;;, Lanzhou;;Hohhot, Gansu;;Inner Mongolia 730000;;010051.; Gao Yanhong, Northwest Institute of Ecoenvironment and Resources, Chinese Academy of Sciences, Key Laboratory of Land-surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Li Suosuo, Northwest Institute of Ecoenvironment and Resources, Chinese Academy of Sciences, Key Laboratory of Land-surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Chen Deliang, Regional Climate Group, Department of Earth Sciences, University of Gothenburg;;Institute of Tibetan Plateau Research, Chinese Academy of Sciences, ;;, Gothenburg;;, Sweden;;Beijing ;;100101.; Zhang Yon...
推荐引用方式 GB/T 7714	Li Ruiqing,Gao Yanhong,Chen Deliang,et al. Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades[J],2018,10(6):482-492.
APA	Li Ruiqing,Gao Yanhong,Chen Deliang,Zhang Yongxin,&Li Suosuo.(2018).Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades.Sciences in Cold and Arid Regions,10(6),482-492.
MLA	Li Ruiqing,et al."Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades".Sciences in Cold and Arid Regions 10.6(2018):482-492.