Water Levels in Crevasses Reveal Subglacial Water Pressure Variations at Helheim Glacier, South East Greenland

Alistair Everett1, Tavi Murray2, Ian Charles Rutt3, Nick Selmes1, Adrian J Luckman4, Timothy James3, Dominic Reeve5, Harshinie Karunarathna6 and Violetta Moloney5, (1)Glaciology Group, Swansea University, Swansea, United Kingdom, (2)Swansea University, Cardiff, CF5, United Kingdom, (3)Swansea University, Cardiff, United Kingdom, (4)Swansea University, Glaciology Group, Swansea, United Kingdom, (5)Swansea University, College of Engineering, Swansea, United Kingdom, (6)Swansea University, Swansea, United Kingdom