Abstract
A nonlinear analytical model of the near-water air layer is considered. In the model, the effect of spray droplets on turbulent exchange is taken into account through their effect on density stratification. To close the system of equations, a semiempirical turbulence theory in the Kolmogorov-Monin form is used. Unlike previous publications, we use an alternative closure scheme that seems more appropriate. A version is also proposed for generalizing the model to the case where heavy admixture particles (spray droplets) make a dominant contribution to the average density of a medium. This model allows a general analytical solution that, in principle, describes non-linear effects such as a decrease in the effective friction and “self-closure” of the heavy admixture in the near-surface layer because of turbulence suppression due to the strengthening of stratification stability. As the current data show, however, the intensity of spray production is probably insufficient to explain the recently discovered phenomenon of the aerodynamic-drag decrease (saturation) in storm winds.
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Original Russian Text © L.Kh. Ingel’, 2011, published in Izvestiya AN. Fizika Atmosfery i Okeana, 2011, Vol. 47, No. 1, pp. 130–139.
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Ingel’, L.K. On the effect of spray on the dynamics of the marine atmospheric surface layer in strong winds. Izv. Atmos. Ocean. Phys. 47, 119–127 (2011). https://doi.org/10.1134/S0001433811010099
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DOI: https://doi.org/10.1134/S0001433811010099