Where will tropical cyclogenesis occur around a preexisting tropical cyclone?

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• 作者：Wenli Shi ; Jianfang Fei ; Xiaogang Huang ; Zhanhong Ma
• 刊名：Geophysical Research Letters
• 出版年：2017
• 出版时间：16 January 2017
• 年：2017
• 卷：44
• 期：1
• 页码：578-586
• 全文大小：14.4MB
• ISSN：1944-8007

文摘

An observational study focusing on the locations of tropical cyclogenesis induced by tropical cyclone energy dispersion (TCED) in the western North Pacific is conducted. Statistical results indicate that the cyclogenesis cases associated with TCED widely occur around preexisting tropical cyclones (TCs). In addition to the typical scenario of cyclogenesis to the southeast of a preexisting TC, new TCs can even form in the east or southwest directions at distances ranging from 1000 km to 3500 km. Further analyses reveal that the locations of cyclogenesis are mainly governed by large-scale environments via regulating the patterns of Rossby wave trains. The observational relationships between wave train regimes and the structures of environmental flows are revealed, which are broadly consistent with previous idealized numerical simulations. The results in this study provide a valuable reference for the prediction of cyclogenesis considering the TCED mechanism.