大气气溶胶粒子折射率虚部反演方法研究

Method of Retrieving Refractive Index of Aerosol Particles

提出了反演折射率虚部的方法.以光散射为原理的粒子计数器测量光学等效直径,其结果受折射率虚部的影响较大;以粒子飞行时间为原理的粒子计数器测量空气动力学直径,其结果不受折射率虚部的影响.利用两种仪器的测量结果受折射率影响的差异来反演大气气溶胶的折射率虚部.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虚部是合理的.

A new method was proposed to retrieve imaginary part of aerosol refractive index by using two kinds of particle counters. One measured the optical size of aerosol particle,which was greatly effected by the refractive imaginary part, and the other one measured aerodynamic of aerosol particle size, which was not effected by refractive imaginary part. The aerosol refractive index was retrieved by combining the measurement of these two kinds of particle counters.