Internal waves in marginally stable abyssal stratified flows
- 1Lavrentyev Institute of Hydrodynamics, 6300090, Novosibirsk, Russia
- 2Novosibirsk State University, Department of Mechanics and Mathematics, 630090, Novosibirsk, Russia
- 3Shirshov Institute of Oceanology, 117997, Moscow, Russia
- 4Aix-Marseille University, Department of Mechanics, Marseille 06, France
Abstract. The problem on internal waves in a weakly stratified two-layer fluid is studied semi-analytically. We discuss the 2.5-layer fluid flows with exponential stratification of both layers. The long-wave model describing travelling waves is constructed by means of a scaling procedure with a small Boussinesq parameter. It is demonstrated that solitary-wave regimes can be affected by the Kelvin–Helmholtz instability arising due to interfacial velocity shear in upstream flow.