[A-CG58] Multi-scale ocean-atmosphere interaction in the tropics

Sun. May 24, 2026 9:00 AM - 10:30 AM 104 (International Conference Hall, Makuhari Messe)

Chairperson:Richter Ingo(JAMSTEC Japan Agency for Marine-Earth Science and Technology), Taschetto Andrea(University of New South Wales), Imada Yukiko(Atmosphere and Ocean Research Institute, the University of Tokyo)

Tropical ocean-atmosphere interactions play an important role in shaping regional and global climate on a broad range of spatiotemporal scales. Since the 1980s, in-situ and satellite observations, reanalysis products, and advancements in climate modeling have facilitated the analysis and enhanced our understanding of variability within the tropical ocean basins. These variability patterns occur on a wide range of timescales, from diurnal, intraseasonal (e.g., MJO), interannual (e.g., ENSO, IOD, and Atlantic Nino) to decadal (e.g., IPO). They drive global atmospheric teleconnections that shape tropical climate variability (e.g. monsoons) and influence extratropical weather systems and extremes (e.g. storm track).
Recent research has uncovered new aspects of tropical ocean-atmosphere interaction, including variations on diurnal timescales, the coupling among the tropical Pacific, Indian, and Atlantic Oceans and its implications for seasonal prediction, as well as the tropical Pacific warming pattern. Long-term changes in the Pacific Walker circulation have received renewed attention as they are intricately linked to the future behavior of ENSO under global warming. Furthermore, changes in the Walker circulation can reshape regional patterns of climate change, thereby influencing climate feedbacks and the global sensitivity to radiative forcing.
Climate, its variability, and its long-term change under global warming are shaped by a variety of processes that are mutually interrelated. To examine these challenging issues from various perspectives and foster understanding of the role of tropical ocean-atmosphere interaction in the climate system, this session offers a forum to discuss recent progress in observational, modeling and theoretical studies of multi-scale ocean-atmosphere interaction in the tropics.

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9:00 AM - 9:15 AM

[ACG58-01] The essential role of tropical-extratropical interactions in tropical Pacific decadal variability

★Invited Papers

*Antonietta Capotondi¹ (1. CIRES/CU Boulder and NOAA/PSL)

9:15 AM - 9:30 AM

[ACG58-02] ENSO rectification suppresses El Niño-like warming and associated atmospheric responses to greenhouse gas forcing

*Takashi Kawamura¹, Clara Deser², Yu Kosaka¹, Bob Payne³, Sarah Larson³ (1. Research Center for Advanced Science and Technology, the University of Tokyo, 2. National Center for Atmospheric Research, 3. North Carolina State University)

9:30 AM - 9:45 AM

[ACG58-03] Zonal Atmospheric Energy Transports and Interannual Shifts in the Walker Circulation

Yiwen Hu¹, *John C H Chiang¹ (1. University of California Berkeley)

9:45 AM - 10:00 AM

[ACG58-04] Robust circulation changes in the tropics under a warming climate

*Tresa Mary Thomas¹, Govindasamy Bala² (1. Earth and Climate Studies, Indian Institute of Science Education and Research, Pune, India, 2. Center for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, India)

10:00 AM - 10:15 AM

[ACG58-05] A linear inverse modeling framework for investigating ENSO-IOD interactions and its application to CMIP6 models

*Ziyu Ye¹, Shoichiro Kido², Tomoki Tozuka¹ (1. The University of Tokyo, 2. Japan Agency for Marine-Earth Science and Technology)

10:15 AM - 10:30 AM

[ACG58-06] Intensified annual cycle of tropical Atlantic sea surface temperature regulates Pacific cooling

*Jianxiang Xu^1,2, Tomoki Tozuka², Jing-Jia Luo¹ (1. Nanjing University of Information Science and Technology, 2. The University of Tokyo)