Abstract: Numerical simulations are used to investigate the impact on the stable boundary layer of moderate topography (with hill heights in some cases comparable to the undisturbed boundary layer depth). Area-averaged properties ...

Abstract: Large eddy simulations use a subgrid model, which is characterized by a length scale that is often related to the scale of the computational mesh by a numerical constant, Cs. Mason and Callen argued that this subgrid model ...

Abstract: Large eddy simulations sometimes use monotone advection schemes. Such schemes are dissipative, and the effective subgrid model then becomes the combined effect of the intended model and of the numerical dissipation. The ...

Abstract: A new turbulent mixing scheme, described in Part I of this paper, is tested in the climate and mesoscale configurations of the U.K. Met. Office?s Unified Model (UM). In climate configuration, the scheme is implemented along ...

Abstract: A new boundary layer turbulent mixing scheme has been developed for use in the UKMO weather forecasting and climate prediction models. This includes a representation of nonlocal mixing (driven by both surface fluxes and ...

Abstract: AbstractTropical cyclones are some of the most devastating natural hazards and the ?three beasts??Harvey, Irma, and Maria?during the Atlantic hurricane season 2017 are recent examples. The European Centre for Medium-Range ...