利用MODIS近红外陆地通道反演浑浊水体上空气溶胶光学厚度

目前MODIS海洋气溶胶反演算法能够很好地给出远海气溶胶性质，但近海结果并不理想。这是因为近海浑浊水体对0.55 µm、0.646 µm波段不能视为暗目标，对于0.86 µm波段也并不是总能视为暗目标。本研究采用MODIS近红外陆地通道对中国东南近海浑浊水体上空的气溶胶进行了反演研究，结果与AEROET符合得较好，这种算法可以很容易的与现行算法相结合，从而能够获得更多宝贵的气溶胶数据。

Retrieval of Aerosol Optical Depth over Turbid Water Using MODIS Land Channels in the Near Infrared Spectral Region

Currently the characteristics of clear ocean areas aerosol can be obtained by the MODIS aerosol retrieval algorithm but the result of brighter coastal waters is not satisfactory. It is because the turbid waters are not dark target for the two aerosol retrieval channels centered near 0.553 µm, 0.646 µm, and they are not always dark target for the channel centered near 0.86 µm. An aerosol retrieval algorithm for remote sensing of aerosol properties over turbid coastal water is described. In this algorithm, channels centered near 0.86 µm, 1.24 µm, 1.64 µm and 2.13 µm are used, and the reflectance of 0.86 µm is corrected under certain circumstances. The proposed algorithm is applicable for MODIS data observed over turbid coastal water in the Southeast of China. The retrieval results agree quite well with the measurements obtained with sun photometers.