厦门地区气溶胶折射率的测量研究

针对气溶胶折射率在分析大气气溶胶光学特性中的重要性，本文提出了一种综合利用黑碳仪、浊度计和光学粒子计数器反演大气气溶胶折射率的新方法。该方法根据黑碳仪和浊度计测量的气溶胶吸收系数和散射系数以及粒子计数器测量的粒子谱分布，采用球形粒子的米（Mie）散射理论，通过分析吸收系数、散射系数、粒子谱分布和折射率之间的关系来反演大气气溶胶粒子的折射率，该方法可以同时反演折射率实部和虚部。通过与其它独立的测量结果对比表明：该方法反演气溶胶折射率是合理的。最后利用此方法对厦门地区的气溶胶折射率进行了分析。

Measurements Refractive Index of Aerosol Particles in Xiamen

The refractive index is important for studying aerosol. A new method is proposed to retrieve the refractive index of aerosol by using Aethalometre、Optical particle counter and Integrating Nephelometer.The absorption coefficient and scattering coefficient are measured with a Aethalometre and Integrating Nephelometer. and at the same time, the number density distribution of aerosol particle is measured by Optical particle counter with nominated radii, Mie theory is used to set up the relationship among the refractive index 、size distribution、absorption coefficient and scattering coefficients. Then, a curve of absorption coefficient and scattering coefficient can be calculated with different refractive index. Actual value of refractive index can be decided with the measurement absorption coefficient and scattering coefficient by Aethalometre and Integrating Nephelometer. The comparisons with other instruments show that this method is satisfactory. The character of refractive indices of aerosol particles retrieved in Xiamen with the proposed method are discussed at last..