Abstract
The supply of heavy suspended sediment into the air from the underlying surface can markedly affect the density stratification and thereby influence substantially the eddy exchange and vertical structure of the atmospheric surface layer. Similar situations also occur in bottom layers of basins. In such situations, the interaction between the temperature and sediment concentration fields becomes essential. This is related to the fact that each field influences the density stratification and, consequently, the turbulent exchange. We present a nonlinear analytical model of such stable stratified surface layer. The model is based on the semi-empirical turbulence theory, and describes, in particular, a well-known effect: a heavy suspended sediment in the surface layer, while increasing the stability of density stratification, can weaken turbulent exchange and increase the velocity of mean horizontal flow.
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