http://www.independent.co.uk/environment/climate-change/shock-as-retreat-of-arctic-sea-ice-releases-deadly-greenhouse-gas-6276134.html
Shock as retreat of Arctic sea ice releases deadly greenhouse gas


Russian research team astonished after finding 'fountains' of methane
bubbling to surface



An excerpt:

"In a very small area, less than 10,000 square miles, we have counted
more than 100 fountains, or torch-like structures, [of methane] bubbling
through the water column and injected directly into the atmosphere from
the seabed," Dr Semiletov said. "We carried out checks at about 115
stationary points and discovered methane fields of a fantastic scale – I
think on a scale not seen before. Some plumes were a kilometre or more
wide and the emissions went directly into the atmosphere – the
concentration was a hundred times higher than normal."