A stochastic model for the calculation of the diffusion of the aerosol cloud in air

The report describes a computerized mathematical model of the behaviour of small aerosol particles and the diffusion of aerosol clouds. The model represents a stochastic process. The calculations of the diffusion of clouds and of the concentration of particles in the air as well as the fallout on the earth are made by the described method. The classical method according to Sutton is used parallelly. The computations have been made using different assumptions as to the parameters of weather etc. The results show that the concentration of the particles in air depends heavily on the meteorologic factors 1.A. Also the calculations of this sort are marred by large uncertainties. The report can be used for the estimation of the concentrations etc. Which operate at various distances from the source. Examples are given in appendices. (GBn)