Trees colonising formerly open tundra as the climate warms could cause Arctic ecosystems to release vast amounts of stored soil carbon into the atmosphere, a new paper argues.

The Arctic is warming twice as fast as the rest of the planet, says James Astill. The retreating ice offers access to precious minerals and new sea lanes—but also carries grave dangers

Much of the change in the Arctic is understood; little of it is reassuring .

Arctic riches unlocked by global warming will not begin to make up for the costs of climate change .

So far, 2012 has been the warmest year the United States has ever seen, with the warmest spring and the second-warmest May since record-keeping began in 1895, the U.S.

NOAA reported that six other arctic monitoring stations in their international cooperative air sampling network have reported CO2 concentrations of 400 ppm this spring.

Monitoring stations in the Arctic detect record levels of carbon dioxide, higher than ever above 'safe' 350ppm mark

Scientists have identified thousands of sites in the Arctic where methane that has been stored for many millennia is bubbling into the atmosphere.

Scientists have identified thousands of sites in the Arctic where methane that has been stored for many millennia is bubbling into the atmosphere.