1. Institut de Ciències del Mar (CSIC) Passeig Marítim de la Barceloneta, 37 Barcelona 08003 Spain
2. Universitat de Barcelona Barcelona 08028 Spain
3. National Institute of Oceanography and Applied Geophysics ‐ OGS Sgonico Trieste 34010 Italy
4. Università degli Studi di Trieste Trieste 34127 Italy
5. CNR‐National Research Council of Italy ISMAR‐Marine Science Institute Bologna 40129 Italy