【摘要】 Landsat-8 TIRS(Thermal Infrared Sensor)作为陆地卫星可获取的新型热红外传感器,在反演地表参数如温度、湿度、热惯量等参数有很好的前景。本文利用Landsat-8 TIRS数据,结合大气上行辐射和下行辐射及不同地物的地表辐射率,通过辐射传输方程法对兰州市地表温度进行反演。结果表明,兰州城市热岛效应显著,总体上城区地表温度高于郊区,平均温差为3℃,同一时期的不同下垫面地表温度差异明显,低温区主要存在于水体及植被覆盖度高的地区,而高温区集中在城关区人口密度较大的地区及七里河和西固的工厂密集区。更多还原

【Abstract】 The TIRS as Landsat can obtain the latest thermal infrared sensor,the inversion of surface parameters such as temperature,humidity,thermal inertia has a good prospect. In this paper,using Landsat 8 TIRS data,combined with atmospheric upward and downward radiation and different features of the surface emissivity,by using the method of radiative transfer equation for surface temperature inversion in Lanzhou City. Results show that the urban heat island effect in Lanzhou,the overall uptown surface temperature higher than the suburbs,and mean temperature difference for 3 ℃,at the same time the different underlying surface of the earth’s surface temperature difference,low temperature zone mainly exist in the area of water body and high vegetation coverage,and high temperature zone concentrated in Chengguan population density of the larger area and Qilihe and Xigu concentration areas of factory.更多还原