Urban Air Pollution Patterns, Land Use, and Thermal Landscape: An Examination of the Linkage Using GIS |
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Authors: | Qihao Weng Shihong Yang |
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Institution: | (1) Associate Professor of Geography, and Director, Center for Urban and Environmental Change, Department of Geography, Geology, and Anthropology, Indiana State University, Terre Haute, IN 47809, USA;(2) Department of Geography, South China Normal University, Guangzhou, 510630, Guangdong, China |
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Abstract: | This article investigates the relationship of local air pollution pattern with urban land use and with urban thermal landscape
using a GIS approach. Ambient air quality measurements for sulfur dioxide, nitrogen oxide, carbon monoxide, total suspended
particles, and dust level were obtained for Guangzhou City in South China between 1981 and 2000. Landsat TM images and aerial
photo derived maps were used to examine city's land use and land cover at different times and changes. Landsat thermal infrared
data were employed to compute land surface temperatures and to assess urban thermal patterns. Relationships among the spatial
patterns of air pollution, land use, and thermal landscape were sought through GIS and correlation analyses. Results show
that the spatial patterns of air pollutants probed were positively correlated with urban built-up density, and with satellite
derived land surface temperature values, particularly with measurements taken during the summer. It is suggested that further
studies investigate the mechanisms of this linkage, and that remote sensing of air pollution delves into how the energy interacts
with the atmosphere and the environment and how sensors see pollutants. Thermal infrared imagery could play a unique role
in monitoring and modeling atmospheric pollution. |
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Keywords: | air pollution pattern Geographic Information System (GIS) Guangzhou land surface temperature urban land use |
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