Russia is suffering from a spate of Arctic wildfires, with monitoring by two Nasa satellites this year recording 10,057 hotspots in Russia's Arctic territory up to the start of August.
According to data provided to the Daily Telegraph, 10 times more fires have been spotted there than in the same period a decade ago and the highest number since satellites recorded their first full year of images in 2003.
Marina Kanishcheva, director of the global fire project at Greenpeace Russia, said: "Climate change has resulted in fires starting where it was too cold or wet for them before, where there weren't people before but where now there are."
While wildfires contribute a quarter of global CO2 emissions, the specific threat from fires above the Arctic Circle is soot, or "black carbon", which often lands on the polar ice pack, accelerating its melting.
Russian authorities do not extinguish many of the northern fires located in the euphemistically named "control zones" far from human settlements, mainly because of the expense.