STUDY ON THE DISTRIBUTION CHANGES OF URBAN HEAT ISLAND BASED ON HEAT-GREENNESS FEATURE SPACE

摘要

Many scholars at home and abroad are extensive concerning about the forming mechanical of urban heat island phenomenon. According to correlation study, the surface temperature in the center of Beijing city and suburbs is separated by 6°C[1]. This paper is a case study on Beijing, successfully retrieve the radiance temperature and Normalized Difference Vegetation Index (NDVI) from the Landsat TM data, analyse the relation model of radiance temperature and NDVI. This paper use the TM date of 1992 and 2004 to construct correspondence relation model, and analyse the model changes. As a result, radiance temperature and NDVI have a strong negative correlation. Under a certain range, the radiance temperature is higher, the correlation between radiance temperature and NDVI is stronger, the slope's absolute value of linear regression model will be steeper. This paper do a dynamic study of correspondence relation model between radiance temperature and NDVI in Beijing, well reflect the relation changes between radiance temperature and NDVI, and provide some Scientific theoretical for urban planning and greenland planning in the future of Beijing.