ON PERTURBATIONS OF GEOSTROPHIC FLOW DETERMINED BY VOLUME SOURCES OF BUOYANCY AND MOMENTUM

Consideration has been given to a linear analytical model of perturbations of geostrophic fl ow of a stratifi ed rotating medium resulting from the action of stationary sources of momentum and/or buoyancy. The problem formulation appears more consistent than the ones considered in the literature. The model makes it possible to evaluate explicitly the amplitudes of such perturbations as a function of the parameters of sources and characteristics of the medium. One example of possible applications is the phenomena occurring during interventions of cold air into a rather warm surface (strong temperature contrasts are, for example, frequent over the water surface in the polar regions). In such cases, the air develops intense penetrating convection which, in rough approximation, acts on the background fl ux as an intense volume heat source and horizontal momentum outlet (background fl ux deceleration due to high eff ective viscosity).
   
Author:  L. Kh. Ingel′
Keywords:  stratifi ed rotating liquid, geostrophic fl ow, buoyancy sources, linear perturbations, analytical model, atmosphere
Page:  979