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DOI	10.1088/1748-9326/ab6669
	Trends in urban land expansion, density, and land transitions from 1970 to 2010: A global synthesis
	Güneralp B.; Reba M.; Hales B.U.; Wentz E.A.; Seto K.C.
发表日期	2020
ISSN	17489318
卷号	15 期号:4
英文摘要	The physical expansion of urban areas lead to lasting impacts on landscapes and livelihoods. Here, we conduct a global synthesis of trends in urban land expansion, in urban population densities, and lands converted into urban from 1970 to 2010. We find that small-medium urban areas lead their larger counterparts in both rates of urban land expansion and decreases in urban population densities. Urban population densities have consistently declined only in India, China, North America, and Europe with significant exceptions across city sizes. Over 60% of the reported urban expansion was formerly agricultural land with China, Southeast Asia, and Europe in the lead. Counterfactual analysis suggests that, due to the decrease in urban population densities, an estimated 125 000 km2 land was converted to urban land uses that could have otherwise remained in cultivation or as natural vegetation. In particular, in India and Nigeria, with much of their populations dependent on agriculture, 85% and 30% more land, respectively, was converted to urban land due to decreasing urban population densities. With increasing urbanization, proactive management of urban land expansion, especially in small and medium cities, will be critical for saving agricultural lands in peri-urban regions while creating equitable and affordable urban landscapes. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Global environmental change; Land change science; Land use; Land use efficiency; Urban planning; Urban sustainability
语种	英语
scopus关键词	Agricultural robots; Cultivation; Land use; Population dynamics; Population statistics; Agricultural land; Global synthesis; Natural vegetation; Proactive management; Small and medium cities; Urban expansion; Urban landscape; Urban population; Expansion; arable land; equity; global perspective; livelihood; periurban area; population density; population growth; soil conservation; urban area; urbanization; China; Europe; India; Nigeria; North America
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154070
作者单位	Texas AandM University, United States; Yale University, United States; Arizona State University, United States
推荐引用方式 GB/T 7714	Güneralp B.,Reba M.,Hales B.U.,et al. Trends in urban land expansion, density, and land transitions from 1970 to 2010: A global synthesis[J],2020,15(4).
APA	Güneralp B.,Reba M.,Hales B.U.,Wentz E.A.,&Seto K.C..(2020).Trends in urban land expansion, density, and land transitions from 1970 to 2010: A global synthesis.Environmental Research Letters,15(4).
MLA	Güneralp B.,et al."Trends in urban land expansion, density, and land transitions from 1970 to 2010: A global synthesis".Environmental Research Letters 15.4(2020).