气候变化领域集成服务门户(CCPortal): Contrasting vegetation changes in dry and humid regions of the Tibetan Plateau over recent decades

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DOI	10.3724/SP.J.1226.2018.00482
	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
通讯作者	Gao, YH (通讯作者)
发表日期	2018
ISSN	1674-3822
起始页码	482
结束页码	492
卷号	10 期号:6
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.
关键词	LEAF-AREA INDEX GROWING-SEASON CLIMATE TEMPERATURE TRENDS
英文关键词	Tibetan Plateau; vegetation change; leaf area index; climate change
语种	英语
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000457535700004
来源期刊	SCIENCES IN COLD AND ARID REGIONS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259214
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]. 中国科学院青藏高原研究所,2018,10(6).
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).
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).