基于TM影像的森林地表温度遥感反演

选取海南三亚市的一个典型区域为研究对象,以Landsat TM影像数据进行林地地表温度遥感反演,分析不同森林类型的地表温度差异,以及地表温度与NDVI之间的关系。结果表明:研究区不同森林类型的地表温度有着显著差异;有林地平均地表温度比无林地低0.7℃;天然林平均地表温度比人工林低2.2℃,天然林在缓解城市热岛效应比人工林更具优势;人工林按优势树种平均地表温度由高到低的顺序为芒果龙眼槟榔橡胶桉树;地表温度和NDVI之间存在高度负相关,相关系数为-0.76。

Retrieving Forest Land Surface Temperature from Landsat TM Data

Studied on the land surface temperature of typical region in Hainan Sanya city by using landsat TM data, analyzed the temperature differences of different forest types, as well as the relationship between land surface temperature and NDVI. The results showed that： land surface temperature of different forest types had a significant difference in the average land surface temperature. The average land surface temperature of forest land was lower 0.7 than non-stocked land; the natural forest was in the significantly lower land surface temperature （2.2 ℃） than the forest plantation ,the natural forest had an irreplaceable advantage in alleviating the urban heat island effect the temperature from highness to lowness by planted dominant tree species：Mango, Longan,Areca,Rubber plant,Eucalyptus; the prominent linear negative correlation between land surface temperature and NDVI was found, the correlation coefficient was -0.76.