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George R. Halliwell¹

(1) University of Miami, Rosenstiel School, Miami, USA

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Sensitivity of nested West Florida Shelf (WFS) simulations to initial and boundary conditions provided by GODAE ocean nowcasts-forecast products is described. The GODAE products evaluated use the HYbrid Coordinate Ocean Model (HYCOM) and are produced by the U. S. Navy and by the NOAA National Centers for Environmental Prediction. Free-running nested WFS simulations were performed for 2004 through 2005 to perform the evaluations, including HYCOM simulations performed at the University of Miami and ROMS simulations performed at the University of South Florida. Evaluation is performed by quantitative comparisons of model fields to moored ADCP velocity measurements and other observations. With complex topography, a strong offshore boundary current, and energetic offshore eddy variability, the WFS domain provides a stringent test of nesting procedures. Initial results demonstrate large sensitivity to nesting boundary location and to the choice of outer model.

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