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Posted Mon Mar 16 2009: from Nature:
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A sleeping giant?
In 2007, scientists scouting the icy waters of the Arctic Ocean began to notice some troubling signs. In about half of their seawater chemistry samples, the concentration of dissolved methane was two to ten times higher than in samples taken during previous years from the same locations. Then, last summer, they observed large rings of gas — sometimes as wide as 30 centimetres in diameter — trapped in ice, as well as methane plumes bubbling to the surface over hundreds of square kilometres of the shallow waters along the Siberian Shelf.... large quantities of methane are becoming destabilized as the planet — and the ocean — heat up. Researchers have long speculated that warming could unleash vast stores of the greenhouse gas from where it lies frozen beneath the sea floor and locked up in Arctic soils. If those deposits were to melt, it would almost certainly trigger abrupt climate change. Methane heats the atmosphere with an efficiency 25 times that of carbon dioxide, and its release could put in motion a positive feedback loop in which warming releases methane, causing further warming, which liberates even more of the gas. Whether that's already happening is anyone's guess.
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Very Scary Tags: methane release, feedback loop, global warming, holyshit
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Gramps says: "What? Anyone's guess? Isn't that what science is supposed to tell us?"
Kim says: "This is such old news -- what's 'Nature' doing reporting it yet again?"
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Blessed and Cursed by Water
Oregon kids face hazard getting to school: diesel fumes... [Biome]
Oregon kids face hazard getting to school: diesel fumes