Comparison between VHF radar observations and data from drifter clusters in the Gulf of La Spezia (Mediterranean Sea)
A. Molcard, P.M. Poulain, P. Forget, A. Griffa, Y. Barbin , J. Gaggelli, J.C. De Maistre , M. Rixen
LSEET, Univ. Toulon, France
(Abstract received 08/24/2009 for session A)
ABSTRACT
Results from a WERA radar system in very high frequency (VHF) mode in a small coastal area (range of 7 km, resolution of 250 m) are compared with surface drifter data. The measurements are performed in the Gulf of La Spezia, a highly populated area characterized by a complex use of the territory, where monitoring of surface currents can play an important role in correct management. The drifters have been launched in clusters of 3–6 units, aimed at investigating the significant time and space variability of the flow. Radial velocities, single trajectories and spreading patterns from radar and drifter data are compared. The results confirm that radar data are well suited for the study of coastal flows in limited areas with complex patterns of velocity and transport.
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