阜平县地表温度遥感反演及其空间特征研究

Remote sensing inversion of land surface temperature and its spatial characteristics in Fuping County

以阜平县为研究区域,基于Landsat 8遥感影像和ASTGTM2 DEM数据,利用辐射传输方程法反演地表温度,运用统计学方法分析地表温度与归一化植被指数(NDVI)、海拔和坡向之间的关系。结果表明:阜平县地表温度整体呈西高东低分布,地表温度与植被覆盖、地形要素之间的关系密切,地表温度高值区域主要分布在研究区西部和东北部海拔较高且NDVI值较高区域,低值区域主要分布在东南部海拔较低且NDVI值较低区域。地表温度随海拔和NDVI的升高逐渐减小,呈现明显的负线性相关;不同坡向的地表温度分布具有一定的差异,阳坡的地表温度高于阴坡。

Taking Fuping County as the research area,based on Landsat 8 remote sensing images and ASTGTM2 DEM data,this paper applies radiation transfer equation method to invert the surface temperature of the study area,and statistical methods to analyze the relationship between land surface temperature and normalized vegetation index,elevation and aspect.The results show that the land surface temperature in Fuping County is high in the west and low in the east.The surface temperature and vegetation coverage and topographic elements are closely related.The high surface temperature areas are mainly distributed in the west and northeast of the study area with higher elevations and higher NDVI values.The low surface temperature areas are mainly distributed in the southeastern areas with lower elevations and lower NDVI values.The statistic results show that the surface temperature gradually decreases with elevation and NDVI,showing a significant negative correlation;the surface temperature distribution of different aspects varies,with the surface temperature of the sunny slope higher than that of the shaded slope.