OS Distinguished Lecture Mesoscale and Submesoscale Processes: Shaping Coastal Circulation and Ecosystem Connectivity
Yusuke Uchiyama
Kobe University
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Biography

Yusuke Uchiyama is a Professor at Kobe University, Japan, whose research focuses on coastal and ocean dynamics, sediment transport, and coupled physical-biogeochemical processes. He earned his B.E., M.E., and Ph.D. degrees in Civil and Environmental Engineering from Tokyo Institute of Technology. His career includes research positions at the Port and Airport Research Institute, a JST-JSPS fellowship at UC Berkeley, and an appointment at UCLA before joining Kobe University in 2011. Uchiyama served as President of the Ocean Sciences Section of AOGS (2019–2024) and is Editor-in-Chief of Coastal Engineering Journal and Editor of Ocean Modelling. His work emphasizes high-resolution numerical modeling of multiscale ocean dynamics, including coastal circulation, Kuroshio variability, and typhoon-driven processes, as well as material transport and ecosystem connectivity. Through integrated modeling approaches, he aims to advance predictive understanding of ocean systems and support sustainable marine management under climate change.

Abstract

Coastal and ocean systems are governed by complex, multiscale dynamics that link local processes—such as tides, waves, and estuarine circulation—with basin-scale currents and climate-driven variability. Understanding these interactions is essential for predicting material transport, ecosystem connectivity, and the impacts of extreme events on marine environments. This keynote will present recent advances in high-resolution numerical modeling of ocean dynamics, focusing on how physical processes such as Kuroshio variability, monsoon-driven upwelling, and typhoon-induced mixing shape coastal circulation and influence sediment and pollutant transport. Case studies will illustrate the role of mesoscale and submesoscale features in connecting coastal and offshore regions, and their implications for resilience and sustainability under climate change. By integrating dynamical modeling across scales, ocean science can provide actionable insights for coastal management, biodiversity conservation, and adaptation strategies. The talk will highlight opportunities for interdisciplinary collaboration and the incorporation of predictive models into policy frameworks, aiming to support sustainable and resilient seas in the Anthropocene.

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