Abstract:This paper presents numerical simulations to investigate the reintensification of a tropical cyclone that formed to the north coast of the Northern Territory of Australia in January 2006 (NT2006) with an asymmetric view. The azimuthally averaged tangential momentum equation is partitioned into mean and eddy terms, and then the magnitudes of the eddy momentum fluxes and subgrid momentum fluxes are compared. The results show that the mean vertical advection of tangential momentum contributes most to the spin up of the azimuthal mean tangential wind, and in the middleupper troposphere the eddy momentum fluxes partly contribute to the spin up of the vortex as well. The comparison of momentum fluxes indicates that the resolved eddy momentum fluxes are much larger than the subgrid momentum fluxes and they are quite different from each other in pattern.