Numerical Experiments with a Multilevel Primitive Equation Model Designed to Simulate the Development of Tropical Cyclones, Experiment I

摘要

The model assumes the storm to be circularly symmetric and is expressed in z-coordinates. The information levels correspond to pressures in the mean tropical atmosphere of 1015, 900, 700, 500, 300, 200, and 100 mb. The heating fucntion for the cyclone-scale motion is simulated by a convective adjustment of the lapse rate towards a pseudoadiabat representative of ascent from the surface boundary layer. The rate of this adjustment is calibrated so that the vertically integrated heatin g function is related to the upward flux of water vapor through the surface boundary layer. Although the transfer of sensible and latent heat from the ocean to the atmosphere is treated rather pragmatically, these preliminary calculations clearly show the sensible heat exchange to be of crucial importance to the development process. (Author)