Brief communication: Bed mapping of southern Greenland outlet glaciers using helicopter-borne ground penetrating radar (AIRETH). - Santin, Ilaria; Horgan, Huw J.; Moser, Raphael; Bjørnholt Karlsson, Nanna; Nick, Faezeh M.; Vieli, Andreas; Rutishauser, Anja; Maurer, Hansruedi; Farinotti, Daniel (Cryosphere, 2026)