Weather events, such as heat waves, winter storms, droughts, floods, and hurricanes, severely impact human well-being. Such events also cause severe disruptions to agriculture, infrastructure, energy delivery and use, industrial activity, and fisheries. To better protect life, property, and food sources, it is in the national interest to provide policymakers and local and regional stakeholders with the reliable information they need to make informed decisions. The provision of such information requires Earth system model simulations that can run fast at increasingly finer scales on emerging computational platforms. In addition, advancing the scientific understanding of the processes occurring at these scales and how they feed back to the larger scales is needed. The project aims to address this Earth system modeling challenge by advancing the capabilities of one of the most widely used Earth system models through the creation of optimized configurations of its ocean component that can run efficiently on advanced supercomputers. The project will make a crucial contribution to the Earth system model, providing critical information at local and regional scales and enhancing the planet's resilience to natural hazards. The project will support the training and education of undergraduate and graduate students, as well as the broader research, policymaking, and stakeholder communities, through specific classes, tutorials, and workshops. The project creates an innovative cyberinf