L.K. Shay, H. Peters, A.J. Mariano, T.M. Cook, E. H. Ryan, T. Ozgokmen
University of Miami/RSMAS
amariano@rsmas.miami.edu
(Abstract received 08/24/2000 for session A)
ABSTRACT
The 4-D current experiment collected a suite of data in the coastal region off of Hollywood, FL during the summer of 1999. The primary data set is OSCR surface velocity data obtained at 250 m resolution. Comparisons to subsurface velocity measurements from ship-board and moored ADCPs reveal high correlations with rms differences of 7-9 cm/s depending upon the depth of the upper most bins. These surface velocity measurements data are space-time interpolated to a regular very-high resolution space-time grid, 100 m in the horizontal and 15 minutes in time. The complex dynamics are nonstationary, heterogeneous and significant events include submesoscale vortices, large lateral meandering of the Florida Current on time scales of hours, eddy merger and periods of strong anomalous southward flow. Dominated periods are 10 and 27 hrs and dominant spatial scales are on the order of 2-3 kms. Simulated Lagrangian trajectories, at the latitude of the Broward County Sewer Outfall, indicate that particles released at least 3 km offshore are mostly likely to leave the domain. The potential benefits of combining high resolution OSCR data with a dense array of drifters will also be discussed.