南京大学学报（自然科学版）2026，Vol.62Issue(2)：204-217,14.DOI:10.13232/j.cnki.jnju.2026.02.004
热带气旋生成前初始中、低层型涡旋的热力结构发展差异
Differences in the development of thermal structures in the types of initial middle and low-level vortices prior to tropical cyclogenesis
摘要
Abstract
By analyzing actual typical cases,the differences in development and roles of initial mid-level(MV)vortices and low-level(LV)vortices during tropical cyclone(TC)genesis were examined.During the early stage of the MV-type TC Koinu,a persistent positive temperature anomaly existed,which was not observed in the LV-type TC Mawar.In addition,the warm core appeared earlier in Koinu than in Mawar.The initial warm core was at a lower altitude in Mawar than in Koinu.When the warm core was strengthened to the same extent,the low-level winds in Mawar intensified more rapidly than in Koinu,thereby enhancing the radial gradient of the sea level pressure,generating stronger low-level radial inflow,which was more favorable for TC intensification.At the same time,the initial mid-level cold anomaly in Koinu also inhibited its intensification.The appearance of the warm core in Mawar was closely related to the subsidence induced warming process,which did not occur in Koinu.Therefore,the difference of initial altitudes of the warm cores in Mawar and Koinu ultimately led to a higher TC genesis efficiency(the occurrence of warm core as the start time in the definition)for Marwar compared to Koinu.Moreover,the warm cores in both Koinu and Mawar appeared prior to obvious intensification and reaching the level of tropical storm,which indicated that the warm core is a prerequisite for TC genesis.关键词
热带气旋/暖核/初始涡旋/生成效率Key words
tropical cyclone/warm core/initial vortex/genesis efficiency分类
天文与地球科学引用本文复制引用
刘乐,刘岩,唐晓东..热带气旋生成前初始中、低层型涡旋的热力结构发展差异[J].南京大学学报（自然科学版）,2026,62(2):204-217,14.基金项目
国家自然科学基金(42275049) （42275049）
