大气气溶胶消光系数的计算方法研究

基于Mie散射理论,在过去的同种颗粒消光系数计算的基础上,对多种成分颗粒的大气气溶胶,建立了消光系数的平均(理论的)计算方法,同时,利用容积占比等效折射率,建立了消光系数的等效计算方法,验证了该等效法的可靠性。随着最近实验测量技术的发展,可将大气气溶胶分成成分相近的若干组分,应用上述方法可按这些组分去计算成分复杂的实际的大气气溶胶的消光系数。对Kleiner Feldberg测量数据的应用得到了较理想的结果,这充分说明了方法的可靠性和可行性。该方法的建立,不仅为气溶胶的光学特性研究提供了一个新的理论方法,也为分析大气环境质量提供了有力的支持。

Study on Calculating Method of Aerosol Extinction Coefficients

Based on Mie' theory and previous calculating method of extinction coefficients for particles of the same compositions,average theoretical and equivalent calculating method of extinction coefficients for aerosols of various compositions was established.Results showed that the equivalent method used equivalent refractive index of volume proportion was reliable.With the development of measurement technology,aerosols were classified in several groups of similar compositions,and extinction coefficients of actual complicate aerosols can be calculated.The application to Kleiner Feldberg' experimental data showed that the method was reliable and feasible,which will provide a new theoretical method for studying optical characteristics of aerosols and for analyzing air environment quality.