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Melting permafrost: Scientists warn of dangers of trapped carbon

2013-02-23 15:00:00| Climate Ark Climate Change & Global Warming Newsfeed

Spiegel: Research published Thursday in the journal Science says that even slightly warmer temperatures could start melting permafrost, which in turn threatens to trigger the release of huge amounts of greenhouse gases trapped in ice. The frosty dungeon hides a dark secret. At least a quarter of the Northern Hemisphere's landmass is frozen and, like a vault, it holds 1,700 gigatonnes of carbon. This unimaginably high quantity of carbon comes from countless generations of creatures that have lived and died...

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A 1.5 C Temperature Rise Could Release Greenhouse Gases in Permafrost

2013-02-22 18:30:00| Climate Ark Climate Change & Global Warming Newsfeed

Yale Environment 360: A global temperature increase of 1.5 degrees Celsius could unleash more than 1,000 gigatons of carbon and methane currently trapped beneath Siberian permafrost and accelerate global climate change, a new study says. In a study conducted in a frozen cave in Siberia, researchers analyzed stalactites and stalagmites which, since they form only when rainwater and snowmelt drip into the caves, provide a glimpse into 500,000 years of changing permafrost conditions. According to their findings, records...

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Siberia permafrost thaw warning

2013-02-22 15:41:00| Climate Ark Climate Change & Global Warming Newsfeed

BBC: Evidence from Siberian caves suggests that a global temperature rise of 1.5C could see permafrost thaw over a large area of Siberia. A study shows that more than a trillion tonnes of the greenhouse gases CO2 and methane could be released into the atmosphere as a result. An international team has published details in the journal Science. The evidence comes from analysis of stalactites and stalagmites in caves along the "permafrost frontier". This is where ground begins to be permanently...

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Siberian stalactites point to permafrost thaw

2013-02-22 15:00:00| Climate Ark Climate Change & Global Warming Newsfeed

Australian Broadcasting Corporation: Climate change Large regions of the planet's permafrost could be vulnerable to thawing if the average global temperature rises just 1.5 degrees more, a new analysis of stalactites and stalagmites in Siberian caves suggests. With climate projections currently suggesting the global climate could warm by more than 2°C over the next century, the new results highlight concerns about the potential for permafrost thawing to amplify climate change by releasing carbon dioxide and methane into the atmosphere....

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1.5C Rise in Temperature Enough to Start Permafrost Melt, Scientists Warn

2013-02-22 06:00:00| Climate Ark Climate Change & Global Warming Newsfeed

Guardian: A global temperature rise of 1.5C would be enough to start the melting of permafrost in Siberia, scientists warned on Thursday. Any widespread thaw in Siberia's permanently frozen ground could have severe consequences for climate change. Permafrost covers about 24% of the land surface of the northern hemisphere, and widespread melting could eventually trigger the release of hundreds of gigatonnes of carbon dioxide and methane, which would have a massive warming effect. However, any such melting...

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