Model calculation of the aerosol optical characteristics at different variants of considering hygroscopic and absorbing properties on the example of atmospheric hazes

摘要

The paper presents the results of one of the stages of development of the empirical model of the optical characteristics of tropospheric aerosol of Western Siberia. The model is based on classification by the types of aerosol weather constructed using the data of long-term measurements at the Aerosol station of IAO SB RAS. Here we discuss different variants of taking into account the aerosol absorbing and hygroscopic properties. The main feature of this paper is considering the size-resolved complex refractive index of particles. The results of model calculation are compared with the average experimental data on the angular scattering coefficient in the small-angle range and the spectral behavior of the aerosol extinction coefficients. It is shown that the most adequate reconstruction of the optical characteristics is reached in the case when the size distribution of absorbing substance has been described by a lognormal function and the dependence of the condensation growth factor on the particle size has been characterized by a maximum at a certain radius.