Abstract
Numerical experiments concerning the medium-scale disturbances were performed with use of a dry model in a channel flow and three typical patterns of disturbances were obtained. When the initial Richardson number (Ri) of the basic field was about 2.0, ordinary baroclinic waves* developed. When Ri was about 0.4 initially, symmetric type of disturbances grew. While, when there existed statically unstable domain initially, a different type of organized disturbances developed. The pattern of the surface pressure resembles the pattern of Case B presented by the numerical experiment of Gambo (1970b). Convective redistribution of heat at small Ri atmosphere played an essential role in the development of this wave.
