【摘要】 气溶胶光学厚度作为描述气溶胶光学特性的重要参数之一 ,在辐射传输和大气订正中被广泛应用。与此同时 ,被广泛应用的大气辐射传输软件MODTRAN却采用水平气象视距作为其输入参数 ,两者之间在遥感应用中存在“脱节”。将两者联系起来对于气溶胶数据的合理利用是很有用的。本文的分析表明两者之间的关系随气溶胶垂直廓线的分布不同而异 ,为此 ,本文根据MODTRAN的模拟结果归纳出一个经验公式 ,分析表明 ,不同季节经验公式的系数是不同的 ,不考虑这种差异时 ,从相同的气象视距下转换得到的气溶胶光学厚度的误差最大可达 0 0 2 9。最后我们将经验公式用于大气订正中。更多还原

【Abstract】 Aerosol optical depth, one of the important parameters to describe the property of aerosol, is widely used in the region of Radiative Transfer and Atmospheric Correction; but at the same time, Meteorological Range but not Aerosol Optical Depth is used as an input parameter for the famous Radiative Transfer program: MODTRAN. It is reasonable to get the relative between Aerosol Optical Depth and Meteorological Range for the convenient using of all kinds of aerosol data. Though there are many expressions to describe the relative between them, the analysis in this paper shows that their relative change with the season change of aerosol profiles. An empirical expression was given here based on the simulation using MODTRAN4, and the coefficient of formula is different with the seasonal change of aerosol profiles. If this difference is ignored, the error of aerosol optical depth error may reach the level of 0.029 when the same meteorological range is transformed.更多还原