Spatio-Temporal Analysis of Vegetation Dynamics as a Response to Climate Variability and Drought Patterns in the Semiarid Region, Eritrea

doi:10.3390/rs11060724

	Spatio-Temporal Analysis of Vegetation Dynamics as a Response to Climate Variability and Drought Patterns in the Semiarid Region, Eritrea
	Measho, Simon 1,2,3; Chen, Baozhang 1,2,4; Trisurat, Yongyut 5; Pellikka, Petri 6,7; Guo, Lifeng 1,2; Arunyawat, Sunsanee 8; Tuankrua, Venus 9; Ogbazghi, Woldeselassie 10; Yemane, Tecle 11
刊名	REMOTE SENSING
	2019-03-02
卷号	11 期号:6 页码:23
关键词	vegetation dynamics climate variability NDVI drought VCI precipitation temperature SPI
ISSN号	2072-4292
DOI	10.3390/rs11060724
通讯作者	Chen, Baozhang(baozhang.chen@igsnrr.ac.cn)
英文摘要	There is a growing concern over change in vegetation dynamics and drought patterns with the increasing climate variability and warming trends in Africa, particularly in the semiarid regions of East Africa. Here, several geospatial techniques and datasets were used to analyze the spatio-temporal vegetation dynamics in response to climate (precipitation and temperature) and drought in Eritrea from 2000 to 2017. A pixel-based trend analysis was performed, and a Pearson correlation coefficient was computed between vegetation indices and climate variables. In addition, vegetation condition index (VCI) and standard precipitation index (SPI) classifications were used to assess drought patterns in the country. The results demonstrated that there was a decreasing NDVI (Normalized Difference Vegetation Index) slope at both annual and seasonal time scales. In the study area, 57.1% of the pixels showed a decreasing annual NDVI trend, while the significance was higher in South-Western Eritrea. In most of the agro-ecological zones, the shrublands and croplands showed decreasing NDVI trends. About 87.16% of the study area had a positive correlation between growing season NDVI and precipitation (39.34%, p < 0.05). The Gash Barka region of the country showed the strongest and most significant correlations between NDVI and precipitation values. The specific drought assessments based on VCI and SPI summarized that Eritrea had been exposed to recurrent droughts of moderate to extreme conditions during the last 18 years. Based on the correlation analysis and drought patterns, this study confirms that low precipitation was mainly attributed to the slowly declining vegetation trends and increased drought conditions in the semi-arid region. Therefore, immediate action is needed to minimize the negative impact of climate variability and increasing aridity in vegetation and ecosystem services.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA 20030302] ; State Key Laboratory of Resources and Environment Information System[O88RA901YA] ; National Key R&D Program of China[2017YFA0604301] ; National Key R&D Program of China[2017YFA0604302] ; National Key R&D Program of China[2018YFA0606001] ; National Key R&D Program of China[2017YFC0503904] ; National Natural Science Foundation of China[41771114] ; Chinese Government Scholarship ; University of Chinese Academy of Sciences
WOS关键词	REMOTE-SENSING DATA ; ENVIRONMENTAL-FACTORS ; TIME-SERIES ; TEMPERATURE ; EVENTS ; TRENDS ; INDEX
WOS研究方向	Remote Sensing
语种	英语
出版者	MDPI
WOS记录号	WOS:000465615300082
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; State Key Laboratory of Resources and Environment Information System ; National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Government Scholarship ; University of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/59753]
专题	中国科学院地理科学与资源研究所
通讯作者	Chen, Baozhang
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Hamelamalo Agr Coll, Natl Commiss Higher Educ, Keren 397, Eritrea 4.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Jiangsu, Peoples R China 5.Kasetsart Univ, Fac Forestry, Bangkok 10900, Thailand 6.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 1000875, Peoples R China 7.Univ Helsinki, Dept Geosci & Geog, Earth Change Observat Lab, FI-00014 Helsinki, Finland 8.Minist Agr & Cooperat, Land Dev Dept, Off Land Use Planning & Policy, Bangkok 10900, Thailand 9.Kasetsart Univ, Fac Forestry, Dept Conservat, 50 Ngamwongwan Rd, Bangkok 10900, Thailand 10.Hamelmalo Agr Coll, Dept Land Resource & Environm, Keren 397, Eritrea
推荐引用方式 GB/T 7714	Measho, Simon,Chen, Baozhang,Trisurat, Yongyut,et al. Spatio-Temporal Analysis of Vegetation Dynamics as a Response to Climate Variability and Drought Patterns in the Semiarid Region, Eritrea[J]. REMOTE SENSING,2019,11(6):23.
APA	Measho, Simon.,Chen, Baozhang.,Trisurat, Yongyut.,Pellikka, Petri.,Guo, Lifeng.,...&Yemane, Tecle.(2019).Spatio-Temporal Analysis of Vegetation Dynamics as a Response to Climate Variability and Drought Patterns in the Semiarid Region, Eritrea.REMOTE SENSING,11(6),23.
MLA	Measho, Simon,et al."Spatio-Temporal Analysis of Vegetation Dynamics as a Response to Climate Variability and Drought Patterns in the Semiarid Region, Eritrea".REMOTE SENSING 11.6(2019):23.