A global map of urban extent from nightlights
Abstract
Urbanization, one of the major human induced land-cover and land-use changes, has a profound impact on the Earth system including biodiversity, the cycling of water and carbon and exchange of energy and water between Earth’s surface and atmosphere, all affecting weather and climate. Accurate information on urban areas and their spatial distribution at the regional and global scales is important for scientific understanding of their contribution to the changing Earth system, and for practical management and policy decisions. We developed a method to map the urban extent from the Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS) nighttime stable-light data at the global level and derived a new global map of 1-km urban extent for year 2000. Based on this map, we found that globally, urban land area is about 0.5% of total land area but ranges widely at regional level from 0.1% in Oceania to 2.3% in Europe. At the country level, urban land area varies from lower than 0.01% to higher than 10%, but is lower than 1% for most (70%) countries. Urbanization follows land mass distribution, as anticipated, with the highest concentration found between 30°N to 45°N latitude and the largest longitudinal peak around 80°W. Based on amore »
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1182943
- Report Number(s):
- PNNL-SA-107842
Journal ID: ISSN 1748-9326; 400409900
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Research Letters
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 5; Journal ID: ISSN 1748-9326
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; nightlights, global, urban, threshold, DMSP/OLS
Citation Formats
Zhou, Yuyu, Smith, Steven J., Zhao, Kaiguang, Imhoff, Marc L., Thomson, Allison M., Bond-Lamberty, Benjamin, Asrar, Ghassem R., Zhang, Xuesong, He, Chunyang, and Elvidge, Christopher. A global map of urban extent from nightlights. United States: N. p., 2015.
Web. doi:10.1088/1748-9326/10/5/054011.
Zhou, Yuyu, Smith, Steven J., Zhao, Kaiguang, Imhoff, Marc L., Thomson, Allison M., Bond-Lamberty, Benjamin, Asrar, Ghassem R., Zhang, Xuesong, He, Chunyang, & Elvidge, Christopher. A global map of urban extent from nightlights. United States. https://doi.org/10.1088/1748-9326/10/5/054011
Zhou, Yuyu, Smith, Steven J., Zhao, Kaiguang, Imhoff, Marc L., Thomson, Allison M., Bond-Lamberty, Benjamin, Asrar, Ghassem R., Zhang, Xuesong, He, Chunyang, and Elvidge, Christopher. Wed .
"A global map of urban extent from nightlights". United States. https://doi.org/10.1088/1748-9326/10/5/054011. https://www.osti.gov/servlets/purl/1182943.
@article{osti_1182943,
title = {A global map of urban extent from nightlights},
author = {Zhou, Yuyu and Smith, Steven J. and Zhao, Kaiguang and Imhoff, Marc L. and Thomson, Allison M. and Bond-Lamberty, Benjamin and Asrar, Ghassem R. and Zhang, Xuesong and He, Chunyang and Elvidge, Christopher},
abstractNote = {Urbanization, one of the major human induced land-cover and land-use changes, has a profound impact on the Earth system including biodiversity, the cycling of water and carbon and exchange of energy and water between Earth’s surface and atmosphere, all affecting weather and climate. Accurate information on urban areas and their spatial distribution at the regional and global scales is important for scientific understanding of their contribution to the changing Earth system, and for practical management and policy decisions. We developed a method to map the urban extent from the Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS) nighttime stable-light data at the global level and derived a new global map of 1-km urban extent for year 2000. Based on this map, we found that globally, urban land area is about 0.5% of total land area but ranges widely at regional level from 0.1% in Oceania to 2.3% in Europe. At the country level, urban land area varies from lower than 0.01% to higher than 10%, but is lower than 1% for most (70%) countries. Urbanization follows land mass distribution, as anticipated, with the highest concentration found between 30°N to 45°N latitude and the largest longitudinal peak around 80°W. Based on a sensitivity analysis and comparison with other global urban area products, we found that our global product of urban area provides a reliable estimate of global urban areas and offer the potential of capturing more accurately their spatial and temporal dynamics.},
doi = {10.1088/1748-9326/10/5/054011},
journal = {Environmental Research Letters},
number = 5,
volume = 10,
place = {United States},
year = {Wed May 13 00:00:00 EDT 2015},
month = {Wed May 13 00:00:00 EDT 2015}
}
Web of Science
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