1. Abdus Salam ICTP, strada costiera 11, Trieste, Italy;
2. Istituto di Oceanografia e di Geofisica Sperimentale - OGS, Via Beirut 2-4, Trieste;
3. Universidade de Trás-os-Montes e Alto Douro, UTAD, Vila Real, Portugal;
4. Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal;
5. DiSTeBA, Università del Salento, Lecce, Italy;
6. CMCC, Lecce, Italy;
7. Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany;
8. Institute for Geophysics and Meteorology, University of Cologne, Germany;
9. Department FE12–Data Assimilation, Deutscher Wetterdienst, Germany