with the new radar? Angelika Humbert: In the summer of 2016, we flew transects over Greenland’s 79° North Glacier and monitored the ice’s typical course for 200 kilometres – in other words, from the inland [...] the glacier to the grounding line. That’s what we call the point where the glacier flows into the sea and its tongue no longer touches the ground. We then took a look at the glacier’s inner structure and [...] below the ice stream. The roughness of this surface is a key factor in computer models of the 79° North Glacier’s flow, since our goal is to make predictions as to whether, and if so, how much, its flow