Simulation of Aerosol Direct Radiative Forcing under Typical Summer Conditions of Siberia. Part 1. Method of Calculation and Choice of Input Parameters

摘要

We present a method for calculating the broadband solar radiation fluxes under clear sky conditions based on the combination of a statistic simulation algorithm and a version of the k-distribution method. An approach to the choice of the input parameters needed for calculating the fluxes and the direct component of the radiative aerosol forcing at the top and the bottom of the atmosphere is described. The approach is based on the combination of the results of multiyear sun photometer measurements of the aerosol optical thickness on the range from 0.37 to 4.0 μm and the atmospheric moisture content in the region of Tomsk with the available models of aerosols, gas components of the atmosphere, and underlying surfaces for determining the deficient parameters, such as the single scattering albedo, the scattering indicatrix of aerosol particles, and the surface albedo.