The Ocean Dynamics and Modeling group at Pacific Northwest National Laboratory (PNNL) studies coastal processes such as coastal circulation, storm surges, extreme waves, tsunamis, sediment transport, and nutrient-macroalgal dynamics using a wide range of numerical models, reanalysis data, and field measurements. These coastal processes affect current and wave conditions that need to be assessed for optimum marine-hydrokinetic energy device siting. Researchers from the Ocean Dynamics and Modeling group apply multiscale and multiresolution modeling approaches to investigate the impacts of climate changes, which occur at regional and global scales, on coastal processes at local scales. A set of high-resolution coastal hydrodynamic models have been developed for broad research topics and geographic regions.