Drought events and their effects on vegetation productivity in China

	Drought events and their effects on vegetation productivity in China
	Zhang, Li 1; Xiao, Jingfeng 1; Zhou, Yu 1; Zheng, Yi 1; Li, Jing 1; Xiao, Han 1
刊名	ECOSPHERE
	2016
卷号	7 期号:12
关键词	HIGH-ACCURACY DEFORMATION MEASUREMENT STRAIN-MEASUREMENT INITIAL GUESS FIELD DISPLACEMENT ALGORITHM GRADIENT ELEMENTS
通讯作者	Zhang, L (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China. ; Zhang, L (reprint author), Key Lab Earth Observat Hainan Prov, Sanya 572029, Hainan, Peoples R China.
英文摘要	Many parts of the world have experienced frequent and severe droughts during the last few decades. Most previous studies examined the effects of specific drought events on vegetation productivity. In this study, we characterized the drought events in China from 1982 to 2012 and assessed their effects on vegetation productivity inferred from satellite data. We first assessed the occurrence, spatial extent, frequency, and severity of drought using the Palmer Drought Severity Index (PDSI). We then examined the impacts of droughts on China's terrestrial ecosystems using the Normalized Difference Vegetation Index (NDVI). During the period 1982-2012, China's land area (%) experiencing drought showed an insignificant trend. However, the drought conditions had been more severe over most regions in northern parts of China since the end of the 1990s, indicating that droughts hit these regions more frequently due to the drier climate. The severe droughts substantially reduced annual and seasonal NDVI. The magnitude and direction of the detrended NDVI under drought stress varied with season and vegetation type. The inconsistency between the regional means of PDSI and detrended NDVI could be attributed to different responses of vegetation to drought and the timing, duration, severity, and lag effects of droughts. The negative effects of droughts on vegetation productivity were partly offset by the enhancement of plant growth resulting from factors such as lower cloudiness, warming climate, and human activities (e.g., afforestation, improved agricultural management practices).
学科主题	Environmental Sciences & Ecology
类目[WOS]	Ecology
收录类别	SCI
语种	英语
WOS记录号	WOS:000390136700003
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39271]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China 2.Key Lab Earth Observat Hainan Prov, Sanya 572029, Hainan, Peoples R China 3.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA 4.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Li,Xiao, Jingfeng,Zhou, Yu,et al. Drought events and their effects on vegetation productivity in China[J]. ECOSPHERE,2016,7(12).
APA	Zhang, Li,Xiao, Jingfeng,Zhou, Yu,Zheng, Yi,Li, Jing,&Xiao, Han.(2016).Drought events and their effects on vegetation productivity in China.ECOSPHERE,7(12).
MLA	Zhang, Li,et al."Drought events and their effects on vegetation productivity in China".ECOSPHERE 7.12(2016).