地形对热红外数据反演林地表面温度的影响  

Influence of Topography on the Woodland Surface Temperature Retrieved from Thermal Infrared Remote Sensing Data

作　　者：孟鹏燕 徐元进[1] 陈曦 

机构地区：[1]中国地质大学数学地质遥感地质研究所,湖北武汉430074 [2]湖北省地质调查院,湖北武汉430034

出　　处：《地理与地理信息科学》2015年第1期32-36,共5页Geography and Geo-Information Science

基　　金：国家自然科学基金项目(41072246);中央高校基本科研业务费专项资金项目(CUG120116)

摘　　要：基于同日过境的Landsat ETM+和TERRA ASTER影像,评估地形对林地表面温度的影响,并针对复杂崎岖地形建立一个林地表面温度归一化模型,集中研究复杂地形(数字高程模型DEM和山体阴影HS)对地表温度的影响,因此只选择同种地物(林地)用于建模;此外,利用逐步掩膜的方法分析了林地边缘混合像元带(过渡带)对模型反演精度的影响。研究结果表明,地表温度和DEM呈负相关关系,与山体阴影呈正相关关系;两种卫星数据都证实了地形对地表温度的影响,且林地边缘过渡带宽度为30m时模型的精度达到最高。The purpose of this study was to assess the influence of topography on the woodland surface temperature, and to build a normalized model for surface temperature for complex and rugged woodland terrain. In this study, TERRA ASTER and Land- sat ETM＋ images which transited in the same day were carried out. These models were mainly focused on the effects of complex topography（Digital Elevation Model（DEM） and illumination（HS））on surface temperature. So only homogeneous objects（wood- land） were used for surface temperature modeling. In addition, this study analyzed the effects of the woodland edge mixed pixels on inversion accuracy model by using progressive masking. The results show that there is a negative correlation between surface temperature and DEM,and a positive correlation between surface temperature and HS. The influence of topography on surface temperature was confirmed in two types of satellite data used, and the precision of the model reached the highest when transition width of the woodland edge was 30 m. The research results have certain reference value for the complex terrain of land surface temperature inversion.

关 键 词：地形 热红外遥感 地表温度 林地 DEM 

分 类 号：TP722.5[自动化与计算机技术—检测技术与自动化装置] TP732.2[自动化与计算机技术—控制科学与工程]