准确获取气溶胶光学厚度对于气候变化研究和大气环境监测具有重要意义,卫星反演气溶胶光学厚度的产品较多,开展不同气溶胶光学厚度产品间 的对比研究,可为用户选择适合的气溶胶光学厚度产品提供重要依据。应用地基气溶胶观测网AERONET提供的气溶胶光学厚度数据,分析了MODIS气 溶胶产品对中国区域四种典型下垫面的适用性。通过对比发现：在中国区域,城郊、森林、湖泊下垫面气溶胶光学厚度反演算法中第六版本最优, 城市下垫面气溶胶光学厚度反演算法中第五版本最好。研究结论可为中国区域的MODIS气溶胶产品选择提供参考。

It is important for researching climate change and monitoring environment to obtain aerosol optical depth accurately. With the aerosol optical depth products derived from satellites increasing, comparison between different aerosol optical depth products can offer an important basis for users to choose the appropriate products. MODIS aerosol products’ applicability for four kinds of underlying surfaces with AERONET ground-based observations data was analyzed. The comparison shows that: in China region, for the suburb, forest, lake, the optimal one is MODIS sixth version retrieval algorithm. The fifth version algorithm is suitable for the urban underlying surface. The conclusions can provide references for selecting MODIS aerosol products in China region.