地基消光测量确定大气气溶胶模型
Determination of the atmospheric aerosol model by ground-based spectral extinction measurements
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摘要: 分别取大陆型、海洋型、城市型和Junge谱分布气溶胶模型，用6S辐射传输算法计算出对应于太阳光度计测量时的各波段大气气溶胶光学厚度。将模式计算值与测量值进行比较，确定测量地区的大气气溶胶模型。将该方法用于2004年在北京地区测量的太阳光度计数据，结果显示该地区当日实际大气在几种气溶胶模型中较为符合城市型气溶胶模型。Abstract: A method to determine the atmospheric aerosol model from the spectral relationships of aerosol optical thickness was presented in this paper. The atmospheric aerosol optical thickness were computed by 6S atmospheric radiative transfer model at multiple spectral bands for continental, maritime, urban aerosol model and Junge power-law model. The values computed were compared with the observed values. Then the most suitable atmospheric aerosol model among the several aerosol models was determined by minimizing the standard deviation between the observed values and those of computed values. This method was applied to the data from the sun-photometer measueements in the outskirt of Beijing in 2004. The results show that the actual atmospheric aerosol model was close to urban aerosol model. The
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Key words:
- atmospheric aerosol model /
- atmospheric extinction /
- optical thickness /
- sun-photometer
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