摘要
借助北京地区1997年、2004年的LandsatTM热红外图像,在RS和GIS技术的支持下,利用大气探空数据对 图像进行大气校正,采用单窗算法反演得到北京市区和周围地区的地表温度分布图,地面验证表明单窗算法反演 地表温度具有较高的精度。研究发现,北京市存在明显的城市热岛效应;不同下垫面所对应的地表温度有明显差 异,总体上城区地面温度明显高于郊区,水体温度最低;随着城市规模的扩张,北京市的城市热岛效应有逐年增强 的趋势,且人为因素对城市热岛的贡献逐渐加大。
In this paper, according to atmospheric observation data, atmospheric correction was firstly done by MODTRAN software to thermal - infrared images of Landsat- TM in 1997 and 2004 in Beijing. Then on the basis of atmospheric correction, the single- window algorithm was used to retrieve the land surface temperature（LST） of urban district and surrounding area of Beijing with the help of RS and GIS technology. The ground measurements show that there is the higher accuracy of single-window algorithm to LST retrieval. The results also show that there is the clear urban heat island（UHI）in Beijing, there is the obvious difference among the different land surface cover type, the LST of urban center is higher than that of suburb area, the temperature of water is the lowest. In addition, there is the clear intensification trend of UHI and the factitious impacts produce the more contribution to UHI in Beijing with the quick expansion of urban area and urban population.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2005年第6期15-18,共4页
Geography and Geo-Information Science
基金
国家自然科学基金(40201036)教育部高等学校博士学科点专项科研基金(20030027014)测绘遥感信息工程国家重点实验室开放基金(WKL(03)0102)
关键词
城市热岛
地表温度反演
大气校正
LANDSAT
TM
单窗算法
北京
urban heat island（UHI）
retrieval of land surface temperature（LST）
atmospheric correction
Landsat TM
single - window algorithm
Beijing
