Abstract: A model system of equations proposed by Lorenz and Krishnamurthy is analyzed. The Hartman-Grobman theorem is employed to prove that the equations of the model admit a slow manifold devoid of gravity-wave activity, and the ...

Abstract: A two-equation turbulence model is used to calculate the effective roughness length for two-dimensional turbulent flow over small amplitude, wavy surface topography. The governing equations are solved using the method of ...

Abstract: The barotropic stability of divergent jets is studied under the condition of small but nonzero Rossby number. Small disturbances to the basic state consist of fast waves of inertio-gravity type and slow waves with speeds ...

Abstract: A two-layer Gulf Stream model is considered. We assume no motion in the lower layer and a basic state zonal jet in the upper. The purpose of the study is to examine numerically the validity of hydrodynamic stability ...

Abstract: Ageostrophic effects on the stability properties of a frictionless adiabatic atmosphere are investigated. The neutral stability boundary is found to consist of the range of variation in the basic state zonal speed. It is ...