报告时间：2026年4月9日（周四）14：30
报告地点：气象楼423会议室
主 持 人：孙巧红 教授
报告题目：Tropics-wide intraseasonal oscillation
报告专家：Jiawei Bao 博士
专家简介:
Jiawei Bao is Marie Curie Postdoctoral Fellow at the Institute of Science and Technology Austria (ISTA). His research focuses broadly on tropical convection and atmospheric dynamics. Dr. Bao use a combination of theory, numerical modeling, and observational data to investigate convection and its interactions with the large-scale circulation. Prior to joining ISTA, he was a postdoctoral researcher at the Max Planck Institute for Meteorology. He completed my Ph.D. in Climate Science at the University of New South Wales in Sydney, Australia. He obtained undergraduate degree from Nanjing University of Information Science and Technology and master’s degree from Beijing Normal University.。
报告摘要：
The tropical climate variability is characterized by various oscillations across a range of timescales. Oscillations that imprint the tropical mean state are generally attributed to slow processes, such as the seasonal cycle or interannual variability. Here, we identify a pronounced tropics-wide intraseasonal oscillation (TWISO) in satellite observations and reanalyses. This oscillation, with a period of 30 to 60 days, is evident across multiple variables and involves interactions between convection, radiation, surface fluxes, and large-scale circulation. It is primarily manifested as convective perturbations in the tropical Indo-Pacific warm pool accompanied by oscillations in the large-scale tropical overturning circulation. Here, we examine the relationship between TWISO, the Madden-Julian Oscillation (MJO), and the instability of radiative-convective equilibrium. Certain phases of TWISO coincide with specific phases of the MJO, suggesting a potential connection between the two. However, although the MJO can amplify the oscillation amplitude of TWISO, it is not essential for TWISO to occur. Finally, due to its broad manifestation across the tropics, TWISO potentially exerts widespread influence on tropical weather and climate at regional scales.
欢迎广大师生踊跃参加！
气候系统预测与变化应对全国重点实验室
气象灾害教育部重点实验室
气象灾害预报预警与评估协同创新中心
大气科学学院
2026.4.3
