Vulnerability of vegetation activities to drought in Central Asia

doi:10.1088/1748-9326/ab93fa

	Vulnerability of vegetation activities to drought in Central Asia
	Deng, Haoyu 1; Yin, Yunhe 1; Han, Xiang 1,2
刊名	ENVIRONMENTAL RESEARCH LETTERS
	2020-08-01
卷号	15 期号:8 页码:12
关键词	drought vegetation vulnerability climate change Central Asia
ISSN号	1748-9326
DOI	10.1088/1748-9326/ab93fa
通讯作者	Yin, Yunhe(yinyh@igsnrr.ac.cn)
英文摘要	Central Asia (CA) is a continental region that is sensitive to water conditions. Hence, drought has one of the primary effects on the vegetation activities in CA and could vary with climate change. However, it is still unclear how the drought vulnerability of vegetation differs among vegetation types and varies with drought scales in CA. Therefore, this paper studied the drought vulnerability of vegetation in CA from 1982-2015. Droughts were detected by using the standardized precipitation evapotranspiration index (SPEI), and the vegetation activities were represented by the Normalized Difference Vegetation Index (NDVI). Only the areas with no change in vegetation types were analyzed, in order to avoid interference with changes in land use. Results showed that both the duration and intensity of droughts were higher in the central, southwestern, and northeastern CA. The growing season (April-October) NDVI decreased by -0.0095 +/- 0.0065 per decade in response to drying trends of 0.21 +/- 0.22 unit aridity index per decade in these drought-concentrated regions. Forests and savannas/woody savannas were more vulnerable to drought from July-September, and their vulnerabilities were higher to droughts with longer time scales. Shrublands and grasslands were more vulnerable to drought from April-May and May-September, respectively, and the vulnerabilities during these months were higher for the droughts at 6-12 months scales. Twelve months was the optimal (most vulnerable) drought scale for the shrublands and grasslands and the secondary drought scale for the savannas/woody savannas. Further analysis of the vulnerability of vegetation to 12 months drought found that it generally increased with the increase of the drought magnitude (duration or intensity) to some peak values and then decreased. However, the vulnerability of forests and savannas/woody savannas increased with the drought intensity. Results would help for the drought risk assessment of vegetation in CA.
资助项目	National Key R&D Program of China[2018YFC1508805] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20020202] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA19040304]
WOS关键词	CLIMATE-CHANGE IMPACTS ; EUROPEAN FOREST ; TIME-SCALES ; ARID LANDS ; DYNAMICS ; PRECIPITATION ; MORTALITY ; GROWTH ; CHINA ; PRODUCTIVITY
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000553503000001
资助机构	National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158232]
专题	中国科学院地理科学与资源研究所
通讯作者	Yin, Yunhe
作者单位	1.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Deng, Haoyu,Yin, Yunhe,Han, Xiang. Vulnerability of vegetation activities to drought in Central Asia[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(8):12.
APA	Deng, Haoyu,Yin, Yunhe,&Han, Xiang.(2020).Vulnerability of vegetation activities to drought in Central Asia.ENVIRONMENTAL RESEARCH LETTERS,15(8),12.
MLA	Deng, Haoyu,et al."Vulnerability of vegetation activities to drought in Central Asia".ENVIRONMENTAL RESEARCH LETTERS 15.8(2020):12.