As shipping debates the pros and cons of using the North Sea Route (NSR) through the Arctic, a German-owned icebreaker has parked at the top of the world as part of a year-long study into global warming.

The F Laeisz-owned 11,820-dwt Polarstern (built 1982) set out on its multi-disciplinary drifting observatory for the study of Arctic climate (MOSAiC) mission two weeks ago.