干旱区生态环境知识资源中心(Arid): Evaluating the Dynamic Changes of Urban Land and Its Fractional Covers in Africa from 2000-2020 Using Time Series of Remotely Sensed Images on the Big Data Platform

Arid

DOI	10.3390/rs13214288
	Evaluating the Dynamic Changes of Urban Land and Its Fractional Covers in Africa from 2000-2020 Using Time Series of Remotely Sensed Images on the Big Data Platform
	Yin, Zherui; Kuang, Wenhui; Bao, Yuhai; Dou, Yinyin; Chi, Wenfeng; Ochege, Friday Uchenna; Pan, Tao
通讯作者	Kuang, WH (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:21
英文摘要	Dramatic urban land expansion and its internal sub-fraction change during 2000-2020 have taken place in Africa; however, the investigation of their spatial heterogeneity and dynamic change monitoring at the continental scale are rarely reported. Taking the whole of Africa as a study area, the synergic approach of normalized settlement density index and random forest was applied to assess urban land and its sub-land fractions (i.e., impervious surface area and vegetation space) in Africa, through time series of remotely sensed images on a cloud computing platform. The generated 30-m resolution urban land/sub-land products displayed good accuracy, with comprehensive accuracy of over 90%. During 2000-2020, the evaluated urban land throughout Africa increased from 1.93 x 10(4) km(2) to 4.18 x 10(4) km(2), with a total expansion rate of 116.49%, and the expanded urban area of the top six countries accounted for more than half of the total increments, meaning that the urban expansion was concentrated in several major countries. A turning green Africa was observed, with a continuously increasing ratio of vegetation space to built-up area and a faster increment of vegetation space than impervious surface area (i.e., 134.43% vs., 108.88%) within urban regions. A better living environment was also found in different urbanized regions, as the newly expanded urban area was characterized by lower impervious surface area fraction and higher vegetation fraction compared with the original urban area. Similarly, the humid/semi-humid regions also displayed a better living environment than arid/semi-arid regions. The relationship between socioeconomic development factors (i.e., gross domestic product and urban population) and impervious surface area was investigated and both passed the significance test (p < 0.05), with a higher fit value in the former than the latter. Overall, urban land and its fractional land cover change in Africa during 2000-2020 promoted the well-being of human settlements, indicating the positive effect on environments.
英文关键词	urban land mapping remotely sensed images impervious surface area fraction vegetation space fraction the whole Africa
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000719331500001
WOS关键词	IMPERVIOUS SURFACE-AREA ; ECOSYSTEM SERVICES ; CHINA ; CARBON ; URBANIZATION ; TEMPERATURE ; EXPANSION ; PATTERNS ; HEALTH ; CLASSIFICATION
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	中国科学院新疆生态与地理研究所 ; 中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368201
作者单位	[Yin, Zherui] Qufu Normal Univ, Rizhao Campus Off, Rizhao 276826, Peoples R China; [Kuang, Wenhui; Dou, Yinyin] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; [Bao, Yuhai] Inner Mongolia Normal Univ, Coll Geog Sci, Hohhot 010022, Peoples R China; [Chi, Wenfeng] Inner Mongolia Univ Finance & Econ, Coll Resources & Environm Econ, Hohhot 010070, Inner Mongolia, Peoples R China; [Ochege, Friday Uchenna] Univ Port Harcourt, Dept Geog & Environm Management, PMB 5323 Choba, Port Harcourt 999062, Nigeria; [Ochege, Friday Uchenna] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, 818 South Beijing Rd, Urumqi 830011, Peoples R China; [Pan, Tao] Qufu Normal Univ, Sch Geog & Tourism, Rizhao 276826, Peoples R China; [Pan, Tao] Qufu Normal Univ, Ctr Land Studies, Rizhao 276826, Peoples R China
推荐引用方式 GB/T 7714	Yin, Zherui,Kuang, Wenhui,Bao, Yuhai,et al. Evaluating the Dynamic Changes of Urban Land and Its Fractional Covers in Africa from 2000-2020 Using Time Series of Remotely Sensed Images on the Big Data Platform[J]. 中国科学院新疆生态与地理研究所, 中国科学院地理科学与资源研究所,2021,13(21).
APA	Yin, Zherui.,Kuang, Wenhui.,Bao, Yuhai.,Dou, Yinyin.,Chi, Wenfeng.,...&Pan, Tao.(2021).Evaluating the Dynamic Changes of Urban Land and Its Fractional Covers in Africa from 2000-2020 Using Time Series of Remotely Sensed Images on the Big Data Platform.REMOTE SENSING,13(21).
MLA	Yin, Zherui,et al."Evaluating the Dynamic Changes of Urban Land and Its Fractional Covers in Africa from 2000-2020 Using Time Series of Remotely Sensed Images on the Big Data Platform".REMOTE SENSING 13.21(2021).