[特邀报告]Cloud-Radiation Feedback Prevents Tropical Cyclones from Reaching Higher Intensities

Cloud-Radiation Feedback Prevents Tropical Cyclones from Reaching Higher Intensities
编号:2522 稿件编号:500 访问权限:私有 更新:2023-04-15 09:40:22 浏览:311次 特邀报告

报告开始:2023年05月08日 10:05 (Asia/Shanghai)

报告时间:15min

所在会议:[13B] 13B、大气物理与气象气候 » [13B-2] 13B-2 中小尺度灾害性天气

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摘要
The prediction of tropical cyclone (TC) intensity remains a major scientific challenge. Recent studies indicate that cloud-radiation feedback plays a positive role in the intensification of TCs during their genesis periods. However, little attention has been given to how cloud-radiation feedback affects TC intensity after genesis. This study shows that cloud-radiation feedback may prevents TCs from attaining higher maximum intensities during their life cycles. It is revealed that the ascending motion induced by the anomalous radiative heating of TC promotes more latent heating on the outer side of the upper eyewall, thus resulting in a more tilted eyewall. A more tilted eyewall leads to a larger inner-core size and less inward flux of absolute vertical vorticity within the inner core, thus preventing the TC from reaching higher intensity. This work is the first to highlight that cloud-radiation feedback may affect TC intensity by modulating the structure of the inner-core convection, and further advances our understanding of the interaction between radiation effect and TC dynamics.
关键字
tropical cyclone,radiation feedback
报告人
杨博雷
北京大学

稿件作者
杨博雷 北京大学
郭晞 江苏省气象局
顾剑峰 英国雷丁大学
聂绩 北京大学
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