Sensitivity of the surface orographic gravity wave drag to vertical wind shear over Antarctica

The physics of orographic gravity wave drag

*Correspondence: Miguel A. C. Teixeira, Department of Meteorology, University of Reading, Earley Gate, PO Box 243, Reading RG6 6BB, UK e-mail: [email protected] The drag and momentum fluxes produced by gravity waves generated in flow over orography are reviewed, focusing on adiabatic conditions without phase transitions or radiation effects, and steady mean incoming flow. The orographi...

Turbulent transport and interactions with the surface Chapter 4 Subgrid - scale orographic drag Chapter 5 Non - orographic gravity wave drag

Self-Acceleration in the Parameterization of Orographic Gravity Wave Drag

A new effect related to the evaluation of momentum deposition in conventional parameterizations of orographic gravity wave drag (GWD) is considered. The effect takes the form of an adjustment to the basicstate wind about which steady-state wave solutions are constructed. The adjustment is conservative and follows from wave–mean flow theory associated with wave transience at the leading edge of ...

Orographic wave drag modelling

The main topic of this article is wave propagation in disordered media. Of particular interest is the long wave regime where an arbitrary rapidly varying orography is modelled as a (stochastic) disordered medium. A brief description of mathematical theory and results is presented. The apparent diffusive behaviour, predicted in the theory for the wave-orography interaction, is confirmed through ...

The Effect of Back-Reflection in the Parameterization of Non-Orographic Gravity-Wave Drag

An efficient method of solution is developed for the Warner and McIntyre parameterization of the drag associated with nonhydrostatic non-orographic inertia–gravity waves. The scheme is sufficiently fast as to enable, for the first time, fully interactive multi-year climate simulations that include the effects of rotation and nonhydrostatic wave dynamics in the parameterization of non-orographic...