AXIALLY SYMMETRICAL NUMERICAL MODEL FOR A TROPICAL CYCLONE.

The model is based on a Lax-Wendroff difference scheme having a second order of accuracy in space and time. This enables one to avoid artificial-viscosity effects to a considerable extent and to perform experiments on the effects of the turbulent viscosity on the evolution of a model tropical cyclone (TC). The results show that the evolution of the TC is very sensitive to the ratio of the dissipation to the generation energy. This indicates that a very vigorous approach is necessary to the physical and numerical apsects of the description of these processes in TC models.