Long-term spatiotemporal variation of drought patterns over the Greater Horn of Africa

doi:10.1016/j.scitotenv.2019.135299

	Long-term spatiotemporal variation of drought patterns over the Greater Horn of Africa
	Haile, Gebremedhin Gebremeskel 1,2,3; Tang, Qiuhong 1,2; Leng, Guoyong 1; Jia, Guoqiang 1; Wang, Jie 1; Cai, Diwen 1; Sun, Siao 1; Baniya, Binod 1; Zhang, Qinghuan 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-02-20
卷号	704 页码:13
关键词	Drought characteristics Drought trends Standardised Precipitat on-Evapotranspiration Index East Africa
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.135299
通讯作者	Tang, Qiuhong(tangqh@igsnrr.ac.cn)
英文摘要	Understanding historical patterns of changes in drought is essential for drought adaptation and mitigation. While the negative impacts of drought in the Greater Horn of Africa (GHA) have attracted increasing attention, a comprehensive and long-term spatiotemporal assessment of drought is still lacking. Here, we provided a comprehensive spatiotemporal drought pattern analysis during the period of 1964-2015 over the GHA. The Standardised Precipitation-Evapotranspiration Index (SPEI) at various timescales (1 month (SPEI-01), 3 month (SPEI-03), 6 month (SPEI-06), and 12 month (SPEI-12)) was used to investigate drought patterns on a monthly, seasonal, and interannual basis. The results showed that despite regional differences, an overall increasing tendency of drought was observed across the GHA over the past 52 yr, with trends of change of -0.0017 yr(-1), -0.0036 yr(-1), -0.0031 yr(-1), and -0.0023 yr(-1) for SPEI-01, SPEI-03, SPEI-06, and SPEI-12, respectively. Droughts were more frequent, persistent, and intense in Sudan and Tanzania, while more severe droughts were found in Somalia, Ethiopia, and Kenya. Droughts occurred frequently before the 1990 s, and then became intermittent with large-scale impacts occurred during 1973-1974, 1984-1985, and 2010-2011. A turning point was also detected in 1989, with the SPEI showing a statistically significant downward trend during 1964-1989 and a non-statistically significant downward trend from 1990 to 2015. Seasonally, droughts exhibited an increasing trend in winter, spring, and summer, but a decreasing trend in autumn. The research findings have significant implications for drought adaptation and mitigation strategies through identifying the hotspot regions across the GHA at various timescales. Area-specific efforts are required to alleviate environmental and societal vulnerabilities to drought events. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41730645] ; National Natural Science Foundation of China[41790424] ; National Natural Science Foundation of China[41425002] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20060402] ; International Partnership Program of the Chinese Academy of Sciences[131A11KYSB20180034] ; International Partnership Program of the Chinese Academy of Sciences[131A11KYSB20170113] ; Newton Advanced Fellowship ; Chinese Academy of Sciences-World Academy of Sciences (CAS-TWAS)
WOS关键词	FOOD SECURITY ; CLIMATE VARIABILITY ; SPATIAL-PATTERNS ; TIME-SCALES ; RIVER-BASIN ; EASTERN ; CHINA ; VEGETATION ; RAINFALL ; TRENDS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000504672800090
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; Newton Advanced Fellowship ; Chinese Academy of Sciences-World Academy of Sciences (CAS-TWAS)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/131225]
专题	中国科学院地理科学与资源研究所
通讯作者	Tang, Qiuhong
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Tigray Agr Res Inst, Mekelle, Ethiopia
推荐引用方式 GB/T 7714	Haile, Gebremedhin Gebremeskel,Tang, Qiuhong,Leng, Guoyong,et al. Long-term spatiotemporal variation of drought patterns over the Greater Horn of Africa[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,704:13.
APA	Haile, Gebremedhin Gebremeskel.,Tang, Qiuhong.,Leng, Guoyong.,Jia, Guoqiang.,Wang, Jie.,...&Zhang, Qinghuan.(2020).Long-term spatiotemporal variation of drought patterns over the Greater Horn of Africa.SCIENCE OF THE TOTAL ENVIRONMENT,704,13.
MLA	Haile, Gebremedhin Gebremeskel,et al."Long-term spatiotemporal variation of drought patterns over the Greater Horn of Africa".SCIENCE OF THE TOTAL ENVIRONMENT 704(2020):13.