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Arctic methane deposits 'starting to release', scientists say
Exclusive: expedition says preliminary findings indicate that new source of greenhouse gas off East Siberian coast has been triggered
www.theguardian.com
Scientists have found evidence that frozen methane deposits in the Arctic Ocean – known as the “sleeping giants of the carbon cycle” – have started to be released over a large area of the continental slope off the East Siberian coast, the Guardian can reveal.
High levels of the potent greenhouse gas have been detected down to a depth of 350 metres in the Laptev Sea near Russia, prompting concern among researchers that a new climate feedback loop may have been triggered that could accelerate the pace of global heating.
The slope sediments in the Arctic contain a huge quantity of frozen methane and other gases – known as hydrates. Methane has a warming effect 80 times stronger than carbon dioxide over 20 years. The United States Geological Survey has previously listed Arctic hydrate destabilisation as one of four most serious scenarios for abrupt climate change.
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Warming oceans the release of huge amounts of methane will cause a global warming catastrophe. More huge fires in the drought-prone west, more Atlantic hurricanes, more Midwest droughts - just to start. And then there's rising sea levels as the arctic ice sheets keep melting.