摘要
利用ＬａｎｄｓａｔＴＭ６热红外遥感数据定量反演了干旱地区的地表温度，研究结果表明，研究区典型地表覆盖类型的地表亮温比地表真实温度低０．４～１Ｋ，遥感反演的地面真实温度与当地３月下旬的实测温度误差在０．８Ｋ以下，这说明用ＬａｎｄｓａｔＴＭ６定量反演干旱区的地表温度是可行的。研究结果还表明，地下水富集带地表温度具有异常现象，其地表温度比地表水体高５Ｋ左右，而比其它地表类型低７Ｋ以上，据此，可以利用热红外遥感技术有效地探测干旱区地下水富集带的信息。
This paper introduces a method to quantitatively estimate the land surface tempe rature(LST)using Landsat TM6 data in the arid region.The research results indica te that brightness temperature(T B)is lower than the real temperature(T R)with a value of 0.4～1K,and the real temperature(T R)estimated through TM6 data,whi ch obtained in March 26,1987,corresponds to the temperature data measured by loc al meteorological station very well.The error is below 0.8K.Meanwhile the land s urface temperature over groundwater enriched zone shows anomalous value as comp ared with temperature of water body and other surface targets,such as vegetation ,dry soils and sand,it is higher than water bodys temperature with a value of 5K,but it is lower than temperature of other surface targets with a value of 7K. The information for groundwater enriched zone in the arid region can be effecti vely detected by using thermal infrared remote sensing techniques.
出处
《遥感技术与应用》
CSCD
1999年第2期34-38,共5页
Remote Sensing Technology and Application
基金
中国科学院重点项目
西部之光项目
关键词
热红外遥感
地表温度
地下水富集带
地下水勘探
Thermal infrared remote sensing
Land surface temper ature
Quantitative estimation
Groundwater enriched zone
Arid region
