Tom Matthews¹, Baker Perry², Deepak Aryal³, Dibas Shrestha³, Arbindra Khadka³ and National Geographic and Rolex’s Perpetual Planet Extreme Expedition to Mount Everest Team, (1)Loughborough University, Department of Geography and Environment, Loughborough, United Kingdom, (2)Appalachian State University, Boone, NC, United States, (3)Tribhuvan University, Central Department of Hydrology and Meteorology, Kathmandu, Nepal