Abstract
The properties of wave disturbances in the Trades are examined theoretically using a primitive equation model. The model is two-dimensional, nonlinear, and time-dependent. It incorporates the effects of condensation heating due to cumulus convection and nonconvective rain. Numerical integrations of the model show the development of two wave types. One wave type is a slowmoving synoptic disturbance while the other type is a fast-moving wave whose nature is not entirely understood. The structure, phase speed, and preferred wavelength of the waves are discussed. The integrations also show that condensation heating due to cumulus convection alone produces only extremely weak disturbances; condensation heating from nonconvective rain is necessary for the generation of large-amplitude disturbances.
