[J] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

[A-OS27] Coastal ocean circulation and material cycle

Mon. May 25, 2026 1:45 PM - 3:15 PM 104 (International Conference Hall, Makuhari Messe)

Chairperson:Ushijima Yusuke(Ehime University), Masunaga Eiji(Ibaraki University)

In the coastal region, which is highly susceptible to human activities and involves complex ocean phenomena, understanding oceanic circulation and material cycles, as well as developing strategies to address environmental changes, is a key issue. For example, various physical processes - such as seawater exchange with the open ocean in regions like the Kuroshio, freshwater discharge from rivers, tidal currents, and associated internal waves, eddies, and turbulent mixing - play essential roles in coastal ocean circulation. Nutrient input from land and the open ocean, along with ocean phenomena related to human activities - such as red tides, oxygen - deficient water masses, and marine pollution - significantly impacts the coastal marine environment. In recent years, the effects of global climate change - particularly ocean warming and acidification-on coastal regions have been gaining attention. Here, we propose an interdisciplinary session on coastal circulation and material cycles.

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1:45 PM - 2:00 PM

[AOS27-01] Long term statistical analysis of North Pacific mesoscale eddies from satellite altimetry and changes in Kuroshio Extension eddy activity associated with Kuroshio path variations

*Kushitani Takumi¹, Yusuke Uchiyama² (1. Department of Civil Engineering, Faculty of Engineering, Kobe University, 2. Department of Civil Engineering, Graduate School of Engineering, Kobe University)

2:00 PM - 2:15 PM

[AOS27-02] Coastal upwelling along the Boso Peninsula coast investigated with a high-resolution numerical model, MRI.COM

*Tomoya Iwazaki¹, Eiji Masunaga¹, Shogo Urakawa², Kei Sakamoto³, Sachihiko Itoh⁴ (1. Ibaraki University, 2. Meteorological Research Institute, Japan Meteorological Agency, 3. Kyoto University, 4. Tokyo University)

2:15 PM - 2:30 PM

[AOS27-03] Long-term variability of sea-land breezes over the northern part of Tokyo Bay

*Ryouma Okamoto¹, Eiji Masunaga¹, Terumitsu Hirata¹ (1. Ibaraki University)

2:30 PM - 2:45 PM

[AOS27-04] Quantifying vertical mixing over the continental slope in the northwestern Sea of Japan

*Dmitrii Stepanov¹, Alexander Ostrovskii², Alexander Lazaryuk¹ (1. Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences, 2. Shirshov Institute of Oceanology, Russian Academy of Sciences)

2:45 PM - 3:00 PM

[AOS27-05] Microstructure observations in Ise Bay during early summer

*Takahiro Tanaka¹, Sachihiko Itoh², Toshimi Nakajima², Akane Kubota¹, Aiko Endo¹, Ryo Sugimoto³, ATSUYOSHI MANDA⁴ (1. Nagasaki University, 2. The University of Tokyo, 3. Fukui Prefectural University, 4. Mie University)

3:00 PM - 3:15 PM

[AOS27-06] Hydrography and material cycling across a shelf–Kuroshio transition zone

*Sachihiko Itoh¹, Eisuke Tsutsumi³, Eiji Masunaga⁴, Anne Takahashi², Daigo Yanagimoto², Toshimi Nakajima², Hitoshi KANEKO⁵, Daisuke Hasegawa⁶, Takahiro Tanaka⁷ (1. Graduate School of Frontier Sciences, The University of Tokyo, 2. Atmosphere and Ocean Research Institute, The University of Tokyo, 3. Kagoshima University, 4. Ibaraki University, 5. Japan Agency for Marine-Science and Technology, 6. Fisheries Research Agency, 7. Nagasaki University)

Session information