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Dispersion 'probability' maps in the Mediterranean Sea.
Claudia Pizzigalli, E. Lombardi, V. Rupolo
ENEA
claudia.pizzigalli@casaccia.enea.it(Abstract received 04/28/2005 for session D)
ABSTRACT
A web site for an easy visualization of surface dispersion properties in the Mediterranean is being constructed. The aim is to obtain a friendly user instrument to be used to have a first information on the statistics of dispersion starting from a generic point in the Mediterranean Sea. Maps of statistical properties of the dispersion are constructed considering 200 28-days long lagrangian simulations in which particles are integrated off-line using the eulerian velocity fields of the MFS (Mediterranean Forecasting System) GCM from September 1999 to July 2004. This OGCM is forced with ECWMF and satellite SST daily data and it 'assimilates' XBT-VOS and altimetry data. In each lagrangian integration about 350 000 particles are uniformly released at surface and then integrated (and constrained to remain at surface) for 28 days. The statistics of the dispersion properties is computed in all the Mediterranean Sea surface considering 'clusters' of particles released in a non-overlapping grid of 3/8° x 3/8° boxes. We present here some examples of seasonal dispersion probability's maps. A possible next step could be the construction in region of particular interest (e.g. ship tracks) of dispersion probability maps as a function of wind regimes.
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2005 LAPCOD Meeting, Lerici, Italy, June 13-17, 2005