[J] Oral

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

[A-OS21] Coastal ocean circulation and material cycle

Mon. May 26, 2025 1:45 PM - 3:15 PM Exhibition Hall Special Setting (2) (Exhibition Hall 7&8, Makuhari Messe)

convener:Taira Nagai(Japan Fisheries Research and Education Agency), Toshimi Nakajima(Atmosphere and Ocean Research Institute, The University of Tokyo), Mitsuko Hidaka(Kagoshima University), Yusuke Ushijima(Ehime University), Chairperson:Taira Nagai(Japan Fisheries Research and Education Agency), Yusuke Ushijima(Ehime 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

[AOS21-01] Marine heatwaves around Japan over the past four decades: Links to low-frequency variability in sea surface temperature

*Yusuke Ushijima¹, Kei Sakamoto², Koji Yagi², Yuma Kawakami³, Hiroki Togawa², Yoshikazu Fukuda² (1.Ehime University, 2.Japan Meteorological Agency, 3.Meteorological Research Institute)

2:00 PM - 2:15 PM

[AOS21-02] Interannual variations of temperature and salinity in the Soya Warm Current region over the past 40 years

*Mariko Honda¹, Kay I. Ohshima², Vigan Mensah², Masatoshi Sato³ (1.Graduate School of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Wakkanai Fisheries Research Institute, Hokkaido Research Organization)

2:15 PM - 2:30 PM

[AOS21-03] Enhanced vertical mixing and turbulent exchange by mesoscale eddies over the continental slope in the northwestern Sea of Japan

*Dmitry Stepanov¹, Yusuke Kawaguchi², Nadya Sachneva¹, Evgeniya Korshenko³ (1.Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences, 2.The University of Tokyo, 3.N.N. Zubov State Oceanographic Institute)

2:30 PM - 2:45 PM

[AOS21-04] Wind-induced coastal upwelling along the east coast of the Japan mainland investigated with satellite observation data

*Kaede Shibata¹, Eiji Masunaga¹ (1.Ibaraki University)

2:45 PM - 3:00 PM

[AOS21-05] Observation of the occasional intrusion of Kuroshio water (Kyucho) and turbulent mixing off Shitaba Bay, Uwajima, in the summer of 2024

*Eisuke Tsutsumi¹, Naoki Yoshie², Xinyu Guo³, Takahiro Endoh⁴, Hakase Hayashida⁵, Toru Miyama⁵ (1.Faculty of Fisheries, Kagoshima University, 2.Premier Institute for Advanced Studies, Ehime University, 3.Center for Marine Environmental Studies, Ehime University, 4.Research Institute for Applied Mechanics, Kyushu University, 5.Application Laboratory, Japan Agency for Marine-Earth Science and Technology)

3:00 PM - 3:15 PM

[AOS21-06] Effect of water intrusion from Bisan Straits on phytoplankton dynamics in Harima Nada in the Seto Inland Sea

*NATSUKI NOGAMI¹, Ryunosuke Kito, Ikuro Hisamatsu³, Masatoshi Nakakuni⁴, Kuninao Tada², Kazuhiko Ichimi², Hitomi Yamaguchi² (1.Kagawa University Guraduate school of agriculture, 2.Kagawa University, 3.Kagawa University Faculity of agriculture, 4.Kagawa University Seto Inland Sea Regional Research Center)

Session information