生态环境学报Issue(4)：639-643,5.
基于TM影像的北京市热环境及其与不透水面的关系研究
Study on the thermal environment and its relationship with impervious surface in Beijing city using TM image
摘要
Abstract
Urbanization transforms natural landscape to artificial impervious surface, which alters water and energy exchange between the land surface and the atmosphere and therefore leads to the urban heat island (UHI) effect. UHI is an important impact factor of the regional climate and ecological environment. How to observe and analysis the spatial distribution and impact factors of UHI has become an important issue of urban environmental research. By using a Landsat Thermal Mapper (TM) remote sensing image acquired on July 26, 2011, the land surface temperature in Beijing city was retrieved by the generalized single channel method, and the imperious surface cover was calculated by the linear spectral unmixing method and Vegetation-Impervious surface-Soil (VIS) model. Then the surface thermal environment of Beijing city and its relationship with imperious surface were studied. Results indicate that the urban heat island effect in Beijing is obvious and shows a concentrated pattern. The heat island intensity in the southern urban area is stronger than the northern urban area. The spatial distribution of urban thermal environment shows similar pattern with that of impervious surface. Land surface temperature increases with the impervious surface cover and its rate depends on the value of impervious surface cover. When impervious surface cover is below 40%, land surface temperature increases steeply with the imperious surface cover in an exponential manner. When impervious surface cover is above 40%, temperature increases slightly with the imperious surface cover in a linear way. This paper reveals the relationship between the impervious surface and the surface temperature, and suggests that the impervious surface cover can be used as an important indicator of urban heat environment, which provides scientific reference for urban planning and environmental evaluation.关键词
城市热环境/北京市/地表温度/不透水面Key words
urban thermal environment/Beijing city/land surface temperature/impervious surface分类
资源环境引用本文复制引用
徐永明,刘勇洪..基于TM影像的北京市热环境及其与不透水面的关系研究[J].生态环境学报,2013,(4):639-643,5.基金项目
城市气象科学研究基金项目（IUMKY&UMRF201102）；国家自然科学基金项目（41201369）；中国科学院寒旱区陆面过程与气候变化重点实验室开放基金项目 （）
