The multi-scale capability of the Model for Prediction Across Scale (MPAS) modeling approach could be extended to include direct simulation of coastal ocean processes as a part of the global ACME system. Coastal processes will mediate many of the societally-relevant impacts driven by anthropogenic greenhouse gas emissions, including regional sea-level rise, coastal ecosystem dynamics, inundation frequency, and fisheries. Depending on the specific science applications, these coastal processes could be included using a high-resolution region within MPAS-Ocean or as a new ACME "component" designed specifically to simulate coastal ocean dynamics, MPAS-Coastal.