high resolution surface current mapping in broward county l. k. shay meteorology and physical...
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HIGH RESOLUTION SURFACE CURRENT MAPPING IN BROWARD COUNTY
L. K. ShayMeteorology and Physical Oceanography
University of Miami
SCIENTIFIC GOAL:
To provide a first-order description of complex oceanic flows and their relationship to surface processes in the littoral ocean subjected to tidal currents, western boundary currents, topographical changes and surface winds.
RESEARCH SUPPORTED BY ONR.
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Acknowledgments:
Jose Vasquez (Hollywood Beach) Jim Davis (Broward County Parks) Sid Leve/Renate Skinner (State Parks) Tom Metz/Garth Jensen (US Navy
SFTF) Stan Dunn (FAU OE Dept) DEP (Steve Higgins, Lou Fisher) June Carpenter (Residence)
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OSCR Worker Bees
Brian Haus Tom Cook Jorge Martinez John Brown Daniel Jacob Jerry Killingsworth
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LITTORAL ZONE
Complex Coastal Processes. 2-D/ 3-D Flow Fields. Boundary Current & Topography. Waves & Boundary Layer Winds. Impact: Civilian and US Navy Needs. Radar/AUV/Mooring/Ship-based
Approach. Applicable to Any Theater.
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VHF RADAR
Phased Array 32 Elements. Electronic Beam Forming. 700 Cells (250 m resolution). 60 km Square Domain. 20 Minute Sample Cycle. Theoretical Limit 11 km. Spectra and Currents.
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Ocean Explorer AUV
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ENGINEERINGOBJECTIVES:
Design/Implement Multiple ADCPs as Part of AUV Payload.
Evaluate Side-Looking Beam Orientations.
Map Currents Relate To Surface Dynamics.
Train Next Generation Graduate Students (i.e. Tactical Oceanography)
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SCIENCE OBJECTIVES:
Coherent Structures (Vortices, Fronts) Isolate BC and Tidal Flows/Forcing of
Iws At Shelf Break. Expand IWs Into Baroclinic Modes. Determine Wavenumber Spectra. Assess Boundary Layer Processes
During Storm and Quiescent Periods.
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Experimental Domain
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EXPERIMENTALDESIGN
VHF Mode of OSCR (7x9 km: 250 m Cell Spacing).
Ship-Based CTD/ADCP (2x2 km) 4-AUV Sampling Patterns (0.5-1km). Cyclesonde. NOVA/USF Moorings. NAVY ADCPs.
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FOWEY ROCKS CMANWinds
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FOWEY ROCKS CMANAtmospheric Pressure
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Sub-Mesoscale Vortex
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Vortex Propagation
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Surface Current Regimes
Strong Florida Current Lobe Structure
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AUV MISSIONS
Mixed Layer: (Current and Turbulence)
Tidal Current: Bottom Boundary: Turbulence: Planned Adverse
Weather:
6 and 12-hr repeated grids : 500 m x 500 m.
15-26 hr: 1km x 1km 7 hr: 1 km x .500 km 4-6 hr: 1 km Xsects 12 hr : 500 m x 500
m (March-April 00)
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AUV Section
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AUV Maps
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Ship ADCP Transect
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Ship ADCP/AUV and OSCR Comparison
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VERTICAL STRUCTURE
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Mooring Comparison
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Mooring Comparison
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MOVE GOAL:
To assess long-term variability of the Florida Current and its influence on Coastal Circulation and Atmospheric Weather Patterns/Events.
Important to Civilian Needs (Ship Traffic; Pollutant Dispersion; Renourishment.)
Important to Navy (Ship/Radar Signatures; Acoustics;Internal Waves)
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LONG-TERM MONITORING
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APPLICATIONS:
Transport of Sand. Beach Renourishment. Sewage Effluent Dispersion. Search/Rescue Operations (Rafters). Cruise Lines. Fishing Industry (Private/Commercial). Ecology/Biological of Coral Reefs
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FRONTAL PASSAGEApril 8-9 2000
http://storm.rsmas.miami.edu/awe00/
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FUTURE RESEARCH
Long-Term Monitoring of Florida Current Using HiFAR (100 km range).
Develop Long-Range AUVs (24-48 hr). Surface/Subsurface Moorings (Cross-
Shelf) Ship-Based Observations (Cross-Shelf) Drifter-Based Deployments Modeling/Assimilation
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SUMMARY
Synergistic Approach: Synoptic Variability.
Fine-Scale to Submesoscale Processes. 2-D/3-D Variability not Mean. Real Time: JTFX (Ships,Aircraft,AUV). Improve Predictive Capability At Navy
Centers. Train Next-Generation Policy Makers.