2000 LAPCOD Meeting

Very-High Resolution Mapping of Surface Currents

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.





2000 LAPCOD Meeting, Ischia, Italy, October 2-6, 2000
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