Research aircraft Polar 5 and Polar 6 Much of the Alfred Wegener Institute’s research is conducted in the inaccessible, ice-covered regions of the Arctic and Antarctic, making research aircraft indispensable [...] and operate at temperatures down to -54 degrees Celsius. The polar 6 research aircraft of the Alfred Wegener Institute flies over the Arctic Ocean during an IceBird sea ice thickness campagne. (Photo: Esther