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Large-Eddy Simulation of air Pollution Dispersion in the Nocturnal Cloud-Topped Atmospheric Boundary Layer |
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| Authors: | Zbigniew Sorbjan Marek Uliasz |
| Institution: | (1) Marquette University, Milwaukee, WI, 53201, U.S.A.;(2) Department of Atmospheric Science, Colorado State University, Fort Collins, CO, 80523, U.S.A. |
| Abstract: | Effects of stratocumulus clouds on the dispersion of contaminants are studied in the nocturnal atmospheric boundary layer. The study is based on a large-eddy simulation (LES) model with a bulk parametrization of clouds. Computations include Lagrangian calculations of atmospheric dispersion of a passive tracer released from point sources at various heights above the ground. The results obtained show that the vertical diffusion is non-Gaussian and depends on the location of a source in the boundary layer. |
| Keywords: | Air pollution dispersion Cloud-generated convection Cloud-topped boundary layer Large-eddy simulations Nocturnal boundary layer |
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