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Ruoying He¹

(1) Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, USA

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A regional ocean model is configured to provide circulation hindcast for the coastal region of the Northeastern United States, encompassing the Gulf of Maine (GOM) and the Middle Atlantic Bight (MAB). Coastal circulation in this region is strongly affected by both local momentum and buoyancy fluxes and a wide range of remote, offshore processes such as basin-scale seasonal and inter-annual variability, Gulf Stream meanders, and meso-scale and submeso-scale eddies. To effectively represent the impact of offshore variability, the Hybrid Coordinate Ocean Model (HYCOM) Global Ocean Data Assimilation Experiment (GODAE) solutions are used to provide open boundary conditions via one-way nesting approach. Validations of this regional hindcast model and synthesis for coastal circulation during 3-year time period from 2003 to 2006 will be presented. Based on realistic, space and time continuous circulation realizations, we will also report findings/understandings on seasonal and inter-annual variability of circulation and shelf/deep- ocean exchange processes in this coastal region.

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