针对中国近海海域的水体大多是混浊水体和其上空有较多吸收性气溶胶的情况, 提出了适合反演该区域上空气溶胶光学特性的新算法。该算法利用多个查找表和基于经验得到下垫面为等效干净水体的晴空图像, 采用插值方法实现了对中国近海海域上空气溶胶光学特性的反演。经过在东山岛地区同地面同步观测多次实验对比, 结果发现该算法可行且具有较高的精度; 并以渤海湾地区为例, 进行了初步的反演应用研究。该算法不仅能为我国海洋和风云系列卫星资料的大气校正研究提供相关的技术基础, 还可以直接利用刚发射的FY-3卫星上的CMODIS数据来反演近海海域的气溶胶光学特性。

Large area of turbid water body and aerosol with high absorption are the main characters of the offshore coast of our country. A new algorithm is developed to retrieve aerosol optical characteristic over coast waters. Based on several look up tables (LUT) and MODIS image of the clear water with ground surface in the clear sky, the model I uses the interpolation method to retrieve the aerosol optical characteristic over the turbid waters. Preliminary validation results comparing with AERONET data in Dongshan island show that the algorithm has good accuracy and promising potential. By using the algorithm, the preliminary retrieval of aerosols are carried out for MODIS data of ocean surface in Bohai bay area. The new algorithms would be useful in studying the atmospheric correction models of HY and FY satellites. And it can directly use CMODIS data of FY-3 to retrieve accurately aerosol optical characteristic and water color of coast zone.