基于ETM+影像的福州市部分城区的地表温度反演与分析

Retrieval and Analysis of Land Surface Temperature in Fuzhou from Landsat /ETM+ Data

以福州市部分地区为研究对象,采用Landsat ETM+第6波段的单窗算法,进行地表温度反演得出地表温度分布图,分析了研究区总体温度分布的特点、研究了三种下垫面类型的温度分布差异及与NDVI的关系、同时对生活建筑区分别取样进行了对比分析。结果表明:研究区中心热岛效应显著;研究区不同的土地覆盖类型地表温度有显著差异,从高到低为,生活建筑区>自然表面>水体;地表温度与归一化植被指数(NDVI)有良好的负相关关系;相同土地覆盖类型开发程度不同,温度也存在差异,此差异小于不同土地覆盖类型之间的温度差。

The Fuzhou land surface temperature distribution is retrieved using the mono-window algorithm from Landsat ETM＋ data band 6. The distribution characteristics of land surface temperature and the differences in temperature distribution on three types of land cover and their relationships with NDVI are analyzed. Meanwhile, the samples from building-up coverage are stud- ied. The results show that heat island effect is remarkable in the centre of research and the temperature difference is prominent on different land coverage, which ranks from building-up to natural surface and water. It also reveals that there is a remarkable negative correlation between the temperature and the NDVI. There is difference in temperature on the same land cover exploited in different extent, which is smaller than the different land cover＇s temperature.