Introducing MODIS AOD high resolution retrieval data, corrected by variational method, into the actual observation PM_10 field on the ground can reflect the spatial distribution characteristics of PM_10 to a certain extent, especially in exurb.

• 经地面实测场变分处理后的MODIS光学厚度变分场可以较高分辨率信息描述北京城区和郊区,尤其是远郊区PM_(10)浓度的空间分布特征。