Atmospheric and Hydrospheric Sciences (A)
Session Sub-category Complex & General(CG)
Session ID A-CG62
Title Changing Midlatitude Atmosphere-Ocean-Ecosystem; Processes, Coupling, and Future Perspectives
Short Title Midlatitude Atmosphere-Ocean-Ecosystem
Main Convener Name Shusaku Sugimoto
Affiliation Graduate School of Science, Tohoku University
Co-Convener 1 Name Lael Wakamatsu
Affiliation Advanced Institute for Marine Ecosystem Change - Japan Agency for Marine-Earth Science and Technology
Co-Convener 2 Name Ayumu Miyamoto
Affiliation Scripps Institution of Oceanography, University of California San Diego
Co-Convener 3 Name Amano Miku
Affiliation Graduate School of Bioresources, Mie University
Co-Convener 4 Name Daiki Ito
Affiliation Fisheries Resources Institute, Japan Fisheries Research and Education Agency
Session Language 
E
Scope 
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.
Presentation Format Oral and Poster presentation
Invited Authors Hiroomi Miyamoto (Tokyo University of Marine Science and Technology)
Koyo Yamagami (JAMSTEC)
Eitarou Oka (The University of Tokyo)
Time Presentation No Title Presenter
Oral Presentation May 26 AM1
9:00 - 9:15 ACG62-01 Role of North Atlantic SST variability in recently observed North Pacific warming Yoko Yamagami
9:15 - 9:30 ACG62-02 Increased water vapor transport of atmospheric rivers over East Asia during the past four decades Youichi Kamae
9:30 - 9:45 ACG62-03 Responses in July water vapor transport fields and heavy rainfall frequency over Kyushu, western Japan, associated with delayed ENSO influence Kazuya Wakao
9:45 - 10:00 ACG62-04 Impact of Positive SST Anomalies in the Midlatitude North Pacific on the December 2022 North American Cold Wave Aizawa Takatora
10:00 - 10:15 ACG62-05 Influence of Sea of Japan sea surface temperatures on heavy snowfall in early winter of 2024/2025 Kenta Tamura
10:15 - 10:30 ACG62-06 Impact of a North Atlantic Marine Heatwave on Record-Breaking Rainfall in Scotland, October 2023 ATSUYOSHI MANDA
Oral Presentation May 26 AM2
10:45 - 11:00 ACG62-07 Efficient sea-surface temperature forecasting using gradient boosting and multi-layer perceptrons in the Western Pacific Takeshi Enomoto
11:00 - 11:15 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 Takahashi
11:15 - 11:30 ACG62-09 Influence of ocean warming associated with the Gulf Stream mender on heavy rainfall in New York City in September 2023 Hidetaka Hirata
11:30 - 11:45 ACG62-10 Role of Subtropical Mode Water in Regulating the Oceanic Response to Tropical Cyclones in the North Pacific Hiroyuki Tomita
11:45 - 12:00 ACG62-11 Observed Weakening of the Kuroshio Driven by the East Asian Winter Monsoon under Ongoing Climate Warming YUXIANG QIAO
12:00 - 12:15 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 Nishikawa
Oral Presentation May 26 PM1
13:45 - 14:00 ACG62-13 Effects of Ocean Warming on Zooplankton Communities in the Western North Pacific Miyamoto Hiroomi
14:00 - 14:15 ACG62-14 Mesoscale Cyclonic Eddies Inject Nutrient to the Kuroshio Recirculation Gyre Takeyoshi Nagai
14:15 - 14:30 ACG62-15 Modeling Harmful Algal Blooms: Linking Large-Scale Climate Drivers and Local Oceanographic Conditions Lael Wakamatsu
14:30 - 14:45 ACG62-16 Linking ENSO-Driven Temperature Variability to Meridional Shifts in Skipjack Tuna Migration Using Tagging Data and Multi-Agent Simulation Kirari Makino
14:45 - 15:00 ACG62-17 Study on the Growth and Decay Patterns of Mesoscale Eddies in the North Pacific Hiromichi Sato
15:00 - 15:15 ACG62-18 Spatiotemporal variability of coastal fronts in the Hyuga-nada Takahiro Yagi
Oral Presentation May 26 PM2
15:30 - 15:45 ACG62-19 Habitable Japan (Climatic Hotspot3) project: recent achievements and observation campaigns Eitarou Oka
15:45 - 16:00 ACG62-20 Topographic Control by the Japan Trench on the Anomalous Intrusion of the Kuroshio Extension Toru Miyama
16:00 - 16:15 ACG62-21 Future changes in the Kuroshio and the Kuroshio Extension in an eddy-resolving climate model Yukito Tamura
16:15 - 16:30 ACG62-22 Upper-ocean structural changes over the North Pacific subtropical associated with surface ocean warming Hungchun Hou
16:30 - 16:45 ACG62-23 Roles of mesoscale current and thermal feedbacks in the Kuroshio Extension simulated by an ocean model Kento Usui
16:45 - 17:00 ACG62-24 Predictability of a cold eddy detachment from the Kuroshio large meander in April 2025 in multiyear prediction experiments using JMA/MRI-CPS3 predicted values as external forcing Takahiro Kusumi
Presentation No Title Presenter
Poster Presentation May 26 PM3
ACG62-P01 Impact of mid-latitude warm sea surface temperature anomalies on the meridional displacement of the Meiyu-Baiu frontal zone Shintaro Ohara
ACG62-P02 Wintertime Turbulent Heat Flux Variability around subarctic front in the central North Pacific, Associated with the Kuroshio Extension Haruto Fujishima
ACG62-P03 Pacific–Japan pattern modulation of summertime clear-air turbulence potential around Japan Takashi Mochizuki
ACG62-P04 Attribution of Multi-Decadal Changes in Deep-Water Circulation of the Japan Sea through Atmospheric Forcing Sensitivity Experiments Amaya Yusuke
ACG62-P05 Impact of Fine-Scale SST Structure in the Sea of Japan on Winter Snowfall over the Japanese Archipelago HYOUGO TAKAKI
ACG62-P06 Relationship between the Transport of the Tsushima Warm Current and Kuroshio Path Variability Ryuya Asatsuma
ACG62-P07 Interaction between Cut-off Lows and Atmospheric Rivers in the Northwestern Pacific Yoshihiro Kawamura
ACG62-P08 A coupled air-sea large eddy simulation framework for the surface wave boundary layer Hidenori AIKI
ACG62-P09 Regional climate response of the Kanto region to the Kuroshio large meander using a high-resolution atmospheric model Miu Ishii
ACG62-P10 Nonunidirectional habitat changes associated with global climate change: The example of the Indo-Pacific king mackerel (Scomberomorus guttatus) in the Taiwan Strait Shin-ichi Ito
ACG62-P11 Atmospheric boundary layer response to the Sanriku offshore SST front from the 2025 summer field campaign Amano Miku
ACG62-P12 Atmospheric Response to Anomalous Surface Ocean Warming during the Winter 2023/2024 Associated with the Extreme Northward Meander of the Kuroshio Extension Nao Kamada
ACG62-P13 Sea surface turbulent heat flux variations in the western North Pacific Yuta Machi
ACG62-P14 Does the subsurface ocean affect sea surface temperature anomalies in summer over the North Pacific? Masami Nonaka
ACG62-P15 The Southward Shift of the North Pacific Westerly Jet Attributed to Sea Surface Temperature Biases: Bias in the Western North Pacific Subtropical Gyre and Its Impact Yusuke Ushijima
ACG62-P16 Impacts of the ENSO-independent Indian Ocean Dipole Modes on atmospheric rivers over the northwestern Pacific during the warm season Yuki Shinagawa
ACG62-P17 Estimation of TKE dissipation rates associated with double diffusion considering ageostrophic effects YUKI IKEDA
ACG62-P18 Atmospheric anomalies associated with the Kuroshio Large Meandering Kentaro Eikawa
ACG62-P19 Comparison of Detrended and Non-Detrended Marine Heatwave Detection in the Maritime Continent Ardiansyah Desmont Puryajati
ACG62-P20 Changes Of Seasonal Cycle In The Western North Pacific CHUYUAN ZHUANG
ACG62-P21 Mechanisms of Summertime Fog Formation in Otsuchi Bay Based on Intensive Radiosonde Observations Tsubasa Hamaguchi
ACG62-P22 Inertia-Gravity Waves around a Cutoff Low Observed over the North Pacific off the Tohoku in the Summer of 2025 Masami Nakao
ACG62-P23 Interannual Variability of Temperature and Salinity in the Mixed Water Region of the Northwest Pacific Ryo Sasaki
ACG62-P24 Regime Shifts in Global Mean Temperature Yoshida Ibuki