THE ASYMMETRIC AND DYNAMIC STRUCTURE OF THE “β-TOP” DIPLOE AND “VENTILATION FLOW” OF THE TARGET TYPHOON FLO DURING TCM-90 FIELD EXPERIMENT

Using intense observational data during TCM-90 field experiment, the asymmetric dynamic and thermodynamic struture and its characteristics relating to typhoon recurvature movement are revealed. Based on the decoposition processing of TCM-90 target typhoon data. the actual characteristics of TC's asymmetric structure, namely,"β-top" dipole and "ventilation flow" systems are obtained, which are quite similar to results of Gray W5 (1991).Moreover. it is found that by analyzing the upper level streamline field. another kind of divergence-convergence dipole.pattern structure is related to typhoon motion. The present paper also proposed the concepts of the vertical difference of the "β-top" dipole dynamic struture and asymmetric thermodynamic structure. the typhoon "warm core" can be described by the analysis of TCM-90 target typhoon intense observational data.