Dynamics in Tropical Cyclone Motion: A Review
热带气旋运动的动力学研究进展

The complexity of tropical cyclone (TC) motion results from a wide variety of external and internal dynamical forcings and their interaction Of particular intricacy is the interaction among large-scale environmental flow, the axially symmetric circulation of TC and the planetary vorticity gradient, which generates secondary asymmetric flow (Beta gyre circulation) that alters TC movement Over the last decade, it has been clear that a primary source of discrepancy between large-scale steering and the TC movement is associated with complex interaction and the resulting track deflection relative to environmental flow referred to as beta drift In this paper, the physical processes that determine the beta gyre dynamics, the beta drift, and the impacts of the vortex structure and environmental shears on beta drift are explored Both the theory and application to TC track forecasting are discussed In addition, other processes involved in the binary cycle interaction, trochoidal motion, and the lower boundary forcing are also examined