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On the Connection between Dissipation Enhancement in the Ocean Surface Layer and Langmuir Circulations
Publisher: American Meteorological Society
Abstract: mechanism for the enhancement of the viscous dissipation rate of turbulent kinetic energy (TKE) in the oceanic boundary layer (OBL) is proposed, based on insights gained from rapid-distortion theory (RDT). In this mechanism, ...
On the Momentum Fluxes Associated with Mountain Waves in Directionally Sheared Flows
Publisher: American Meteorological Society
Abstract: The direct impact of mountain waves on the atmospheric circulation is due to the deposition of wave momentum at critical levels, or levels where the waves break. The first process is treated analytically in this study ...
The Effect of Wind Shear and Curvature on the Gravity Wave Drag Produced by a Ridge
Publisher: American Meteorological Society
Abstract: The analytical model proposed by Teixeira, Miranda, and Valente is modified to calculate the gravity wave drag exerted by a stratified flow over a 2D mountain ridge. The drag is found to be more strongly affected by the ...
On the Momentum Flux of Vertically Propagating Orographic Gravity Waves Excited in Nonhydrostatic Flow over Three-Dimensional Orography
Publisher: American Meteorological Society
Orographic Drag Associated with Lee Waves Trapped at an Inversion
Publisher: American Meteorological Society
Abstract: he drag produced by 2D orographic gravity waves trapped at a temperature inversion and waves propagating in the stably stratified layer existing above are explicitly calculated using linear theory, for a two-layer atmosphere ...
An Analytical Model of Mountain Wave Drag for Wind Profiles withShear and Curvature
Publisher: American Meteorological Society
Abstract: An analytical model is developed to predict the surface drag exerted by internal gravity waves on an isolated axisymmetric mountain over which there is a stratified flow with a velocity profile that varies relatively slowly ...
Mountain Waves in Two-Layer Sheared Flows: Critical-Level Effects, Wave Reflection, and Drag Enhancement
Publisher: American Meteorological Society
Abstract: Internal gravity waves generated in two-layer stratified shear flows over mountains are investigated here using linear theory and numerical simulations. The impact on the gravity wave drag of wind profiles with constant ...
Mountain-Wave Turbulence in the Presence of Directional Wind Shear over the Rocky Mountains
Publisher: American Meteorological Society
Abstract: AbstractMountain-wave turbulence in the presence of directional wind shear over the Rocky Mountains in Colorado is investigated. Pilot reports (PIREPs) are used to select cases in which moderate or severe turbulence ...