High-spatiotemporal-resolution mapping of global urban change from 1985 to 2015

被引：581

作者：

Liu, Xiaoping ^{[1
,2
]}

Huang, Yinghuai ^{[1
]}

Xu, Xiaocong ^{[1
]}

Li, Xuecao ^{[3
]}

Li, Xia ^{[4
]}

Ciais, Philippe ^{[5
]}

Lin, Peirong ^{[6
]}

Gong, Kai ^{[6
]}

Ziegler, Alan D. ^{[7
]}

Chen, Anping ^{[8
,9
]}

Gong, Peng ^{[10
]}

Chen, Jun ^{[11
]}

Hu, Guohua ^{[4
]}

Chen, Yimin ^{[1
]}

Wang, Shaojian ^{[1
]}

Wu, Qiusheng ^{[12
]}

Huang, Kangning ^{[13
]}

Estes, Lyndon ^{[14
]}

Zeng, Zhenzhong ^{[6
,15
]}

机构：

[1] Sun Yat Sen Univ, Sch Geog & Planning, Guangdong Key Lab Urbanizat & Geosimulat, Guangzhou, Peoples R China

[2] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China

[3] Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA USA

[4] East China Normal Univ, Sch Geog Sci, Key Lab Geog Informat Sci, Minist Educ, Shanghai, Peoples R China

[5] UVSQ, CNRS, CEA, Lab Sci Climat & Environm,UMR 1572, Gif Sur Yvette, France

[6] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA

[7] Mae Jo Univ, Chiang Mai, Thailand

[8] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA

[9] Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA

[10] Tsinghua Univ, Dept Earth Syst Sci, Key Lab Earth Syst Modeling, Minist Educ, Beijing, Peoples R China

[11] Natl Geomat Ctr China, Beijing, Peoples R China

[12] Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA

[13] Yale Univ, Yale Sch Forestry & Environm Studies, New Haven, CT USA

[14] Clark Univ, Grad Sch Geog, Worcester, MA 01610 USA

[15] Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China

来源：

NATURE SUSTAINABILITY | 2020年 / 3卷 / 07期

基金：

国家重点研发计划;

关键词：

URBANIZATION; GROWTH;

D O I：

10.1038/s41893-020-0521-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

High-resolution global maps of annual urban land coverage provide fundamental information of global environmental change and contribute to applications related to climate mitigation and urban planning for sustainable development. Here we map global annual urban dynamics from 1985 to 2015 at a 30 m resolution using numerous surface reflectance data from Landsat satellites. We find that global urban extent has expanded by 9,687 km(2) per year. This rate is four times greater than previous reputable estimates from worldwide individual cities, suggesting an unprecedented rate of global urbanization. The rate of urban expansion is notably faster than that of population growth, indicating that the urban land area already exceeds what is needed to sustain population growth. Looking ahead, using these maps in conjunction with integrated assessment models can facilitate greater understanding of the complex environmental impacts of urbanization and help urban planners avoid natural hazards; for example, by limiting new development in flood risk zones. The world keeps urbanizing. This study finds that since 1985 global urban lands have expanded four times faster than previously recognized and faster than population is growing.

引用

页码：564 / +

页数：15

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