Tropical cyclone rainbands (TCRs) are the most striking and persistent feature of tropical cyclones (TCs). Torrential rainfall associated with TCRs is one of the major causes for the occurrence of extreme floods as TCs approach or encounter landmass and has a wide variety of significant impacts on the earth system and society. TCRs are traditionally classified into inner and outer rainbands based on the degree to which convection is influenced by the inner-core vortex circulation. In contrast to a better understanding of the inner TCRs, the initiation and development of outer TCRs remain largely unexplored and controversial. This article improves our understanding on the origin and evolution of outer TCRs by using a combination of Taiwan and Japan Doppler radar and surface observations to track the history of an outer TCR from its formative to mature stage. This research work not only presents a detailed and insightful analysis of a squall-line-like outer rainband but also provides a generally clear and insightful contribution to the field.

Tropical cyclone rainbands (TCRs) are the most striking and persistent feature of tropical cyclones (TCs). Torrential rainfall associated with TCRs is one of the major causes for the occurrence of extreme floods as TCs approach or encounter landmass and has a wide variety of significant impacts on the earth system and society. TCRs are traditionally classified into inner and outer rainbands based on the degree to which convection is influenced by the inner-core vortex circulation. In contrast to a better understanding of the inner TCRs, the initiation and development of outer TCRs remain largely unexplored and controversial. This article improves our understanding on the origin and evolution of outer TCRs by using a combination of Taiwan and Japan Doppler radar and surface observations to track the history of an outer TCR from its formative to mature stage. This research work not only presents a detailed and insightful analysis of a squall-line-like outer rainband but also provides a generally clear and insightful contribution to the field.

Citation: Yu, C.- K.*, C.- Y. Lin, and J.- S. Luo, 2019: Tracking a long-lasting outer tropical cyclone rainband: Origin and convective transformation. J. Atmos. Sci., 76, 3267-3283, doi: 10.1175/JAS-D-19-0126.1. (SCI)