[A-CG62] Changing Midlatitude Atmosphere-Ocean-Ecosystem; Processes, Coupling, and Future Perspectives

Tue. May 26, 2026 10:45 AM - 12:15 PM 201A (International Conference Hall, Makuhari Messe)

Chairperson:Miku Amano(Graduate School of Bioresources, Mie University), Miyamoto Ayumu(Scripps Institution of Oceanography, University of California San Diego)

Midlatitude oceans are experiencing rapid and complex transformations, including a rise in the frequency and intensity of marine heatwaves. Around Japan in particular, ocean warming has been accelerating, with unprecedented changes in major currents such as the longest Kuroshio large meander on record, the northward retreat of the Oyashio, and the extreme northward meandering of the Kuroshio Extension. These changes have contributed to record-breaking hot summers, heavy rainfall events, and major shifts in fisheries and marine ecosystems. This session invites studies employing observational, modeling, and theoretical approaches to explore how large-scale atmospheric processes drive midlatitude ocean variability and how changes in ocean currents, temperature, and stratification feed back to influence weather, climate, and marine ecosystems. Covering a wide range of temporal and spatial scales, from synoptic variability to long-term climate change, the session aims to deepen discussions toward building a new integrated midlatitude science that connects atmospheric physics, physical oceanography, biogeochemistry, and fisheries science, taking Japan as a key perspective. With various datasets and methodologies now available, this session welcomes contributions that advance process understanding and future perspectives. Taking Japan and the western North Pacific as a focal region, we also encourage contributions addressing connections with tropical or polar regions to better understand their roles in the global climate system.

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10:45 AM - 11:00 AM

[ACG62-07] Efficient sea-surface temperature forecasting using gradient boosting and multi-layer perceptrons in the Western Pacific

*Takeshi Enomoto¹, Aki Saito², Saori Nakashita¹ (1. Disaster Prevention Research Institute, Kyoto University, 2. Graduate School of Science, Kyoto University)

11:00 AM - 11:15 AM

[ACG62-08] Life Cycle of Marine Fog over a Warm Eddy off the Sanriku Coast, Japan: Insights from Hourly Shipborne Radiosonde Observations in Summer 2025

*Naoya Takahashi¹, Hatsumi Nishikawa², Ryohei Yamaguchi³, Shusaku Sugimoto^4,5, Fumiaki Kobashi⁶, Amano Miku⁷, Yoshihiro Tachibana⁷, Meiji Honda¹ (1. Niigata University, 2. Hokkaido University, 3. Japan Agency for Marine-Earth Science and Technology, 4. Tohoku University, 5. Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), 6. Tokyo University of Marine Science and Technology, 7. Mie University)

11:15 AM - 11:30 AM

[ACG62-09] Influence of ocean warming associated with the Gulf Stream mender on heavy rainfall in New York City in September 2023

*Hidetaka Hirata¹, Rhys Parfitt², Masami Nonaka³ (1. Rissho University, 2. Florida State University, 3. Japan Agency for Marine-Earth Science and Technology)

11:30 AM - 11:45 AM

[ACG62-10] Role of Subtropical Mode Water in Regulating the Oceanic Response to Tropical Cyclones in the North Pacific

Yuki Abe², *Hiroyuki Tomita^1,2, Eitaro Nakada² (1. Faculty of Environmental Earth Science, Hokkaido University, 2. Graduate School of Environmental Science, Hokkaido University)

11:45 AM - 12:00 PM

[ACG62-11] Observed Weakening of the Kuroshio Driven by the East Asian Winter Monsoon under Ongoing Climate Warming

*YUXIANG QIAO¹, Shusaku Sugimoto^1,2, Bo Qiu³, Shuya Wang², Shoichiro Kido⁴, Hirohiko Nakamura⁵ (1. Department of Geophysics, Graduate School of Science, Tohoku University, 2. Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), Tohoku University, 3. Department of Oceanography, University of Hawaii at Manoa, 4. Application Laboratory, Japan Agency for Marine-Earth Science and Technology, 5. Faculty of Fisheries, Kagoshima University)

12:00 PM - 12:15 PM

[ACG62-12] Air-sea interaction in the Subpolar Front in the Sea of Japan under the longest cold wave of 2025/26 winter based on intensive atmospheric and oceanic observations

*Hatsumi Nishikawa¹, Meiji Honda², Yuji Kashino³, Miku Amano⁴, Shu Okubo⁴, Kotomi Kishi⁴, Karen Uchibori², Takahiro Sakamoto², Genki Togawa⁵, Hiroaki Kawase⁶ (1. Hokkaido University, 2. Niigata University, 3. National Fisheries University, 4. Mie University, 5. Kanazawa University, 6. Meteorological Research Institute)

Session information