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Carolina Coastal Change Processes

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COAWST Modeling

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Regional Scale Modeling

The regional scale modeling task involves the development of a coupled numerical model that will predict how regional atmospheric forcing and oceanographic circulation cause material to be transported by tides, winds, waves, fresh water fluxes, and density variations along the East Coast of the United States. This model will be used to drive sub-regional predictive models for several locations along the coastlines of North and South Carolina.

To achieve this goal the capabilities of an existing modeling system as developed by the USGS Community Sediment Modeling Project (Warner, et al 2008) 1 will be advanced to include model coupling amongst multiple models (atmosphere, wave, and ocean), structured grid refinement (of the ocean and wave model), capability to use different grids for each model, and model coupling at the various refinement levels. These improvements will allow the system to predict how processes acting over regional scales (such as variations in atmospheric pressure and wind stress) will affect changes in smaller sub-regional focus areas.

Grid Refinement

Development of a regional and sub-regional scaled modeling system using our COAWST modeling system. The application consists of a 12 km grid for the WRF model, and a 5 km grid for the ROMS and SWAN models. Grid refinement for the ocean and wave models allow increased resolution in the targeted Task research areas (NC Coastal Change, SC Coastal Change, and Cape Shoals).

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