基于CBERS-02 IRMSS和MODIS数据的地表温度反演与热环境评价

Study on Land Surface Temperature Retrieving and Thermal Environment Evaluation Based on CBERS-02 IRMSS and MODIS Data

应用中巴资源卫星热红外遥感数据(CBERS-02 IRMSS)和普适性单通道算法反演福州市的地表温度。反演过程中使用同时相的MODIS数据在像元尺度上获取的大气水汽含量替换标准大气模拟值,参考气候资源评价中人体舒适度指数模型,建立基于地温的热环境评价模型,并对福州城市热环境进行评级。结果表明:中巴资源卫星热红外数据对城市热岛和热环境研究具有重要的应用价值,多源遥感数据的结合可以提高地表温度的反演精度,而基于遥感反演参数的热环境指数评价方法能够较好地描述城市热环境的空间特征。

The issue of urban thermal environment and urban heat island effect are important contents in urban climate and environmental research.Retrieving and analyzing land surface temperature（LST） is an efficient way to study this issue.In this paper,Fuzhou was taking as typical study area to study LST retrieving and thermal environment evaluation.CBERS-02 IRMSS thermal infrared remote sensing data for generalized single-channel algorithm developed by Jimenez and Sobrino were used to retrieve LST,and MODIS data acquired with the same day were used to calculate atmospheric water vapor content at the pixel scale which was an important parameter for the algorithm. Based on the results of LST and the atmospheric water vapor content retrieved, thermal environment index（TEl） model was built to evaluate and analyze urban thermal environment of Fuzhou. Results show that CBERS-02 IRMSS remote sensing data play important role in studying urban heat island and its thermal environment, and combination of multi-satellite data can improve accuracy of LST retrieval, meanwhile the TEI evaluation method can be effectively used to describe the quality of urban thermal environment.