by Benjamin A. Robson and Ina Nagler, August 18, 2025
Tunsbergdalsbreen, the largest outlet glacier of the Jostedalsbreen ice cap, remains one of the most remote and logistically challenging sites for glacier research in Norway. Located six hours on foot and from the nearest road, the glacier is accessible only by carrying all equipment through steep, rugged terrain and ascending more than 1000 latitudinal metres.
This year’s JOSTICE field team comprised of Benjamin Robson and Ina Nagler from the University of Bergen, supported by the University of Nottingham Mountaineering Club who are continuing the legacy of surveying the glacier, something their institute has been involved in since the 1950s. The group this year faced the added challenge of transporting not just scientific gear, but also a 23 kg EcoFlow power station – a critical addition that enabled continuous UAV (unmanned aerial vehicle) flights in the field.
Wingtra UAV surveying above Tunsbergdalsbreen (video: Benjamin Robson).
Building on last year’s work, the team surveyed the majority of the glacier tongue using a Wingtra UAV, capturing high-resolution data over the majority of the glacier.
And weather was as unpredictable as ever. Dense fog repeatedly rolled in over the glacier, forcing the team to wait in readiness for windows of clear visibility.
The 2025 campaign not only extended the record of glacier change but also demonstrated how combining mountaineering expertise, modern drone technology, and careful logistical planning can overcome the challenges of studying such an inaccessible environment.