1. Department of Mathematics and Geosciences, University of Trieste, via Weiss 2, 34127 Trieste, Italy
2. Department of Geosciences, University of Pisa, Pisa, Italy
3. SOCIB, Balearic Islands Coastal Observing and Forecasting System, ParcBit, Ctra. Valldemossa km 7.4, Ed. Naorte, 07121 Palma, Illes Balears, Spain
4. Department of Physics and Earth Sciences ‘M. Melloni’, University of Parma, V. le G.P. Usberti, 157/A, 43100 Parma, Italy