Stratification of aleurite and sand particle size distribution in windsand flux over desertified areas
G.I. Gorchakov1, A.V. Karpov1, R.A. Gushchin1, O.I. Datsenko1, D.V. Buntov1
A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Moscow, Russia
Keywords: desertification, windsand flux, saltation, aleurite particle mode, particle size distribution function, function distribution approximation, vertical profiles of function distribution parameters
Abstract
Empirical model of the saltating aleurite and sand particle size distribution has been developed based on the measurements of the number differential concentration in the size range from 30 to 330 mm using size distribution approximation by sum of two lognormal distributions. Approximations of the vertical profiles of distribution parameters have been derived for the layer from 0 to 15 cm. Vertical profiles of the modal size of the large particle in the saltation layer from 3 to 15 cm and in the surface air layer from 0.125 to 16 m are compared with measurements in the Aral region.
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