Paper
Spatio-temporal Pattern of Urban Cool Island Intensity and Its Eco-environmental Response in Chang-Zhu-Tan Urban Agglomeration
- Authors:
- Shaoqing Li; Yaling Dai; Hongwei Mo
- Abstract
- Thermal environment is a very important composition of urban ecosystem. This paper presents an investigation on the application of combining remote sensing (RS) with geographic information systems (GIS) to detect urban cool island intensity (UCII) and the assessment of its associated ecosystem in Chang- Zhu-Tan urban agglomeration, Hunan Province in China. Land surface temperature (LST) retrieved using single-channel method from Landsat data during the year of 1989, 2001 and 2006. Four typical areas with different land covers are selected to study the influence on UCII. It is found that the different rural baselines obvious influence the value of UCII, and the maximum being larger than 2℃. And the relationship among UCII, NDVI and atmospheric diffusion were calculated. The results show that there is a negative correlation between UCII and NDVI, but the correlation coefficient of linear regression equation drop from - 0.845 to -0.606. The urban cool island makes the atmosphere stable above the city and inhibits the atmospheric diffusion that aggravates the air pollution among Chang-Zhu-Tan urban agglomeration.
- Keywords
- Urban cool island; land surface temperature; NDVI; thermal inertia; atmospheric diffusion; Chang-Zhu-Tan urban agglomeration
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- EndPage
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