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Proceedings Paper

Impact of impervious surface on urban heat island in Wuhan, China
Author(s): Liqin Cao; Pingxiang Li; Liangpei Zhang
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Paper Abstract

Impervious surfaces (IS), as one of the most important land cover types and characteristic of urban/suburban1 environments, are known to effect urban surface temperatures by altering the sensible and latent heat fluxes. This study examined the effect IS spatial patterns have on land surface temperature (LST) in Wuhan, China. LST were retrieved from the corrected TIR band (10.4~12.5μm) of Landsat images using Single-Channel method. IS distribution, together with vegetation and soil distribution, was estimated through a fully constrained linear spectral mixture model. Four endmembers, vegetation, soil, low albedo, and high albedo were selected to model heterogeneous urban land cover. Impervious surface fraction was estimated by analyzing low and high albedo endmembers. Correlation analyses were conducted to investigate the changing relationship of LST with impervious surface. The result indicated there was a strongly positive relationship (r2>0.85) between LST and percent impervious surface for all seasons, which suggested the variations in LST could be accounted for very well by percent impervious surface.

Paper Details

Date Published: 29 December 2008
PDF: 9 pages
Proc. SPIE 7285, International Conference on Earth Observation Data Processing and Analysis (ICEODPA), 72855H (29 December 2008); doi: 10.1117/12.815911
Show Author Affiliations
Liqin Cao, Wuhan Univ. (China)
Pingxiang Li, Wuhan Univ. (China)
Liangpei Zhang, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 7285:
International Conference on Earth Observation Data Processing and Analysis (ICEODPA)
Deren Li; Jianya Gong; Huayi Wu, Editor(s)

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