| Autor: |
Tran, Hung, Uchihama, Daisuke, Ochi, Shiro, Yasuoka, Yoshifumi |
| Předmět: |
|
| Zdroj: |
International Journal of Applied Earth Observation & Geoinformation; Jan2006, Vol. 8 Issue 1, p34-48, 15p |
| Abstrakt: |
Abstract: This study focuses on using remote sensing for comparative assessment of surface urban heat island (UHI) in 18 mega cities in both temperate and tropical climate regions. Least-clouded day- and night-scenes of TERRA/MODIS acquired between 2001 and 2003 were selected to generate land-surface temperature (LST) maps. Spatial patterns of UHIs for each city were examined over its diurnal cycle and seasonal variations. A Gaussian approximation was applied in order to quantify spatial extents and magnitude of individual UHIs for inter-city comparison. To reveal relationship of UHIs with surface properties, UHI patterns were analyzed in association with urban vegetation covers and surface energy fluxes derived from high-resolution Landsat ETM+ data. This study provides a generalized picture on the UHI phenomena in the Asian region and the findings can be used to guide further study integrating satellite high-resolution thermal data with land-surface modeling and meso-scale climatic modeling in order to understand impacts of urbanization on local climate in Asia. [Copyright &y& Elsevier] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full Text from ScienceDirect