中文摘要：

将NASA MODIS气溶胶光学厚度产品AOT与北京市清华园PM2.5质量浓度进行比较分析.研究表明,AOT和PM2.5均有明显的季节性变化特征;二者的日均值相关性在冬半年要明显低于夏半年,说明二者受到季节的显著影响.利用相对湿度和气溶胶标高等气象条件进行校正后,AOT与PM2.5具有较高的相关性.因此,MODIS AOT可以作为监测PM2.5分布以及传输的有效补充手段.

英文摘要：

The AOT （aerosol optical thickness） data,retrieved by the MODIS on Terra satellite,were compared with PM 2.5 mass concentration at Tsinghua University. It was shown that both AOT and PM 2.5 had obviously seasonal-change character,and the linear correlation coefficient between them was better in summer than in winter. After modifying weather conditions,such as RH and aerosol elevation,we always found a high correlation coefficient between AOT and PM 2.5 . The present study suggests that MODIS AOT is an effective means for monitoring PM air quality.