For 1,000 years the indigenous Nenets people have herded their reindeer along the Yamal peninsula. But their survival in this remote region of north-west Siberia is under serious threat from climate change as Russia's ancient permafrost melts.
Yamal, the remote region of north-west Siberia is now under heavy threat from global warming. Traditionally the Nenets travel across the frozen Ob River in November and set up camp in the southern forests around Nadym. These days, though, this annual winter pilgrimage is delayed. Last year the Nenets, together with many thousands of reindeer, had to wait until late December when the ice was finally thick enough to cross.