A NUMERICAL EXPERIMENTAL STUDY OF TROPICAL CYCLONE CROSSING SUBTROPICAL HIGH
Yang Meichuan and ZhuYongti (Shanghai Typhoon Institute,Shanghai,200030)
The barotropic primitive equations model is used in a numerical study of a tropical cyclone crossing the Subtropical high. It is revealed that apart from its own characteristics, sensitive factors having immediate effects on the motion of the tropical cyclone also include its radial distance from the center of the subtropical high, the variation in latitudinal location and intensity. A complex mechanism for nonlinear interactions among the tropical,subtropical high and β effect is also shown in the experiment, and expected to serve for the diagnosis and prediction of abnormal motion.