Vol. 19, issue 12, article # 12

Kruchenitskii G.M., Marichev V.N. On the role of turbulent diffusion in vertical distribution of aerosol particles. // Atmospheric and oceanic optics. 2006. V. 19. No. 12. P. 960-963.
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Based on calculation of the kinetic energy of an aerosol particle conditioned by turbulent diffusion in the atmosphere, the diffusion effects on the aerosol particle vertical distribution have been investigated qualitatively. The Gibbs method shows that turbulent diffusion, whose intensity decreases with the altitude, favors the equilibrium existence of aerosol layers. The stabilization altitude of the layers depends on aerosol particle sizes and the rate of the diffusion coefficient decrease. It is found that the increase in the turbulent diffusion intensity leads to the expansion of the range of particle sizes, which can be in equilibrium at stratospheric heights. This can be one of the mechanisms of the negative feedback in stabilization of the stratospheric temperature. The obtained conclusions are qualitatively proved by results of the stratospheric aerosol lidar sounding in Tomsk and Yakutsk.