Current Understanding of Wave Characteristics in Tropical Storms
热带风暴中波动特征的研究进展和问题

In this study,recent advances in studying wave characteristics in tropical storms are reviewed and some key issues that have been neglected in previous studies are discussed,including the limitations in wave solutions of inertial-gravity waves and vortex Rossby waves as well as departures of theoretic analyses from observational research.Furthermore,mixed vortex Rossby inertial-gravity waves in tropical storms are explored in the context of quasi-balanced dynamics,showing the co-existence of rotational and divergent flows associated with these waves.The mixed-wave dynamics are investigated using the potential vorticity conservation principle,and then the high resolution simulation of Hurricane Bonnie(1998) is used to diagnose these wave characteristics with the method of asymmetric wave decomposition.It is shown that vortex Rossby waves are more prominent with the wavenumber-one component which still have strong divergent flow,while the mixed wave features are more significant with wavenumber-two component.