Abstract
The long-range transport of dust in east Asia is analyzed using a conditioned-particle approach. A one-dimensional K–E model with algebraic stress is used to describe the boundary layer dynamics at various locations along the transport path. The turbulent flow fields created using the boundary layer model are used to simulate the transport and dispersion of dust during a spring storm in China. The particle movement studies in the resultant fields indicate that the turbulence is effective in dispersing the plume in the initial few hours after the emissions take place. The boundary layer shear starts dominating the plume dispersion at later times. The calculated plume growth rate is greater while traveling over land surface than when over the sea. This results from the greater strength of the diurnal oscillation and the larger boundary layer shear over the land surface compared to the sea. Calculated plume widths and concentrations are in good agreement with the limited available observations. DOI: 10.1034/j.1600-0889.1993.t01-4-00003.x
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