人間活動の影響を受けやすく、多様な海洋現象が複雑に絡み合う沿岸域では、その海洋・物質循環の基礎原理の理解と、環境変動への対策の両面が極めて重要な課題となっている。例えば、黒潮流域などの外洋との海水交換や、河川からの淡水流入、潮汐流やそれに伴い発生する内部波、渦、乱流混合などの多様な物理過程が沿岸海洋の物質循環に重要な役割を果たしており、外洋・陸域からの栄養塩供給や人間活動に伴う赤潮・貧酸素水塊の発生、海洋汚染などは沿岸海洋環境に大きく影響する。さらに近年では、全球規模の気候変動に伴う海洋温暖化・酸性化が沿岸域に及ぼす影響にも注目が集まっている。本セッションでは、物理、生物、化学といった分野の垣根を超え、多様な研究トピックの発表を歓迎する。

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.