1. Graduate School in Polar Science; University of Siena; Siena Italy
2. Environmental and Earth Sciences Department; University Milano-Bicocca; Milan Italy
3. Milano-Bicocca section; INFN; Rome Italy
4. Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ; Gif-sur-Yvette France
5. Earth Sciences Department; University of Pisa; Pisa Italy
6. CNR; Institute of Geosciences and Earth Resources; Pisa Italy
7. Diamond Light Source; Didcot UK
8. ENEA-; Rome Italy
9. INFN Laboratori Nazionali di Frascati; Frascati Italy
10. Rome International Center for Materials Science Superstripes; Rome Italy
11. Département Terre Environnement Espace; University of Nice Sophia Antipolis; Nice France
12. Department of Environmental Sciences Informatics and Statistics; Università Ca' Foscari-Venezia; Venice Italy