Hirata, H., R. Kawamura, M. Nonaka, and K. Tsuboki, 2021: Kuroshio-enhanced convective rainband associated with an extratropical cyclone in the cold season. J. Meteor. Soc. Japan, 99,
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A convective rainband developed along a non-classic front (outer front), which formed to the north of a warm front, associated with an extratropical cyclone. The rainband produced record-breaking heavy rainfall to Miyake Island, Japan, on 8 January 2017. This study examined roles of surface latent and sensible heat fluxes from the Kuroshio Current in the intensification of the rainband using cloud-resolving numerical experiments. Results derived from the numerical experiments indicated that the heat fluxes, especially the latent heat fluxes, enhanced the rainband by increasing the moisture content and convective instability.
- A convective rainband associated an extratropical cyclone caused heavy precipitation to Miyake Island in January 2017.
- Cloud-resolving numerical experiments showed that surface sensible and latent heat fluxes from the Kuroshio Current had roles in the intensification of the rainband.
- The heat fluxes, especially the latent heat fluxes, intensified the rainband via increases in the moisture content and convective instability.