Global patterns of NDVI-indicated vegetation extremes and their   sensitivity to climate extremes

doi:10.1088/1748-9326/8/2/025009

CORC > 北京大学 > 城市与环境学院

	Global patterns of NDVI-indicated vegetation extremes and their sensitivity to climate extremes
	Liu, Guo ; Liu, Hongyan ; Yin, Yi
刊名	environmental research letters
	2013
关键词	NDVI vegetation extreme global vegetation vulnerability climate extreme INDEPENDENT COMPONENT ANALYSIS NET PRIMARY PRODUCTION SOUTHERN AFRICA SATELLITE DATA UNITED-STATES EL-NINO DROUGHT FOREST VULNERABILITY AMAZON
DOI	10.1088/1748-9326/8/2/025009
英文摘要	Extremes in climate have significant impacts on ecosystems and are expected to increase under future climate change. Extremes in vegetation could capture such impacts and indicate the vulnerability of ecosystems, but currently have not received a global long-term assessment. In this study, a robust method has been developed to detect significant extremes (low values) in biweekly time series of global normalized difference vegetation index (NDVI) from 1982 to 2006 and thus to acquire a global pattern of vegetation extreme frequency. This pattern coincides with vegetation vulnerability patterns suggested by earlier studies using different methods over different time spans, indicating a consistent mechanism of regulation. Vegetation extremes were found to aggregate in Amazonia and in the semi-arid and semi-humid regions in low and middle latitudes, while they seldom occurred in high latitudes. Among the environmental variables studied, extreme low precipitation has the highest slope against extreme vegetation. For the eight biomes analyzed, these slopes are highest in temperate broadleaf forest and temperate grassland, suggesting a higher sensitivity in these environments. The results presented here contradict the hypothesis that vegetation in water-limited semi-arid and semi-humid regions might be adapted to drought and suggest that vegetation in these regions (especially temperate broadleaf forest and temperate grassland) is highly prone to vegetation extreme events under more severe precipitation extremes. It is also suggested here that more attention be paid to precipitation-induced vegetation changes than to temperature-induced events.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000321425100056&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 14; ARTICLE; 2; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/322247]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Liu, Guo,Liu, Hongyan,Yin, Yi. Global patterns of NDVI-indicated vegetation extremes and their sensitivity to climate extremes[J]. environmental research letters,2013.
APA	Liu, Guo,Liu, Hongyan,&Yin, Yi.(2013).Global patterns of NDVI-indicated vegetation extremes and their sensitivity to climate extremes.environmental research letters.
MLA	Liu, Guo,et al."Global patterns of NDVI-indicated vegetation extremes and their sensitivity to climate extremes".environmental research letters (2013).