城市建筑材质-地表温度的关系遥感研究

Urban environment is a critical part of the land surface ecosystem. It is important to study the relationships between urban building materials and land surface temperature for understanding the urban heat island effect. PROBA CHRIS hyperspectral image is used to extract building materials and natural surfaces based on a hierarchical classification method in Beijing. In this study, the relationships between building materials in the urban area and land surface temperature are quantitatively analyzed by combining with land surface temperature in Beijing retrieved by thermal infrared data of Landsat TM, and the influence on urban heat island leaded by different materials and the influencing factors are discussed. The results indicate that the brick and tile-roof buildings have the highest temperature, and are about 1.6-3.6K higher than the other building materials, 6.0-8.3K higher than natural surfaces; metal surface, concrete, cement and asphalt have nearly the similar surface average temperature and lower than brick and tile; the glass curtain wall can reduce the surface temperature effectively and is about 2.4-3.2K lower than the others.