Środowiskowe Seminarium Fizyki Atmosfery

This paper documents numerical experiments with a single-column, high-resolution model of the stable boundary layer. The model resolves the logarithmic sub-layer, and does not require inverting the Monin-Obukhov similarity functions in order to calculate the surface fluxes. The turbulence closure is based on the K-theory approach, with stability functions of the Richardson number that were evaluated by using the SHEBA and CASES-99 data. The standard deviations of the vertical velocity σw, temperature σθ, the dissipation rates ε and εθ, as well as the structure parameters for velocity Cv2, and temperature CT2, are diagnosed based on gradient-based similarity theory and steady-state budget equations. A comparison with high-resolution large-eddy simulation models shows a very good agreement. The reported numerical experiments are designed to study the effects of shear, thermal stratification, subsidence, and baroclinicity by varying the surface cooling rate CR, roughness parameter zo, the geostrophic wind G, and the Coriolis parameter f.