tokens: We thank the US Air Force Research Laboratory, Agence Nationale de la Recherche (ANR-OS-BLAN-0033-01), Conseil des Programmes Scientifiques et Technologiques (CPST) for their great support. We would also like to thank the Polar Institut Paul Emile Victor (IPEV) for the precious infrastructure and friendly help. M. Chadid is indebted to all the people who participated in the Antarctica expeditions within the PAIX framework.
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