Abstract: Jefferys' analysis of wavelike instabilities observed in turbulent water running down an incline is extended to wavelike instabilities in the wind over level ground. In the lowest part of the atmosphere the wind experiences ...

Abstract: A simple two-layer model of atmospheric flow over a rough surface is used to compare the Jeffreys drag mechanism with shear flow instability. Both function as sources of internal gravity waves, but the analysis indicates ...

Abstract: In a geostrophically balanced region of the atmosphere the horizontal pressure gradients do no work since they are aligned at right angles to the winds, but near the earth's surface where friction destroys geostrophic ...

Abstract: Middle atmosphere wind irregularities with vertical scales less than about 5 km are modeled as gravity shear waves that terminate abruptly on attaining Hodges?s condition for overturning, N2 ≈ 0. A quasi-random spectrum ...

Abstract: No abstract available.

Abstract: Mountain-associated sound is a well known natural acoustic signal that can be traced back to windy mountainous areas. Direct monitoring in such regions reveals much low-phase-velocity wind noise: in this paper we suggest ...

Abstract: It is postulated that a simple relationship exists between the thermodynamic state of surface air supporting severe storm convection and the potential temperature of the overlaying tropopause. The thesis is tested using ...

Abstract: Gravity waves induced by two- and three-dimensional terrain features are examined theoretically in the planetary boundary layer (PBL) using a linear wave model that includes reabsorption at a critical level. The PBL structure ...

Abstract: Gravity swirl waves are three-dimensional internal gravity waves in cylindrical coordinates. A radially propagating gravity swirl wave transports angular momentum from a central source region to distant regions of the ...