Unstable Siberian Arctic Shelf Leaking Greenhouse Gas Methane
FAIRBANKS, Alaska, March 9, 2010 (ENS) - A Siberian section of the Arctic Ocean seafloor that stores vast amounts of frozen methane is showing signs of instability and is venting the potent greenhouse gas, an international research team reported Friday.
The permafrost under the East Siberian Arctic Shelf, long thought to be an impermeable barrier sealing in the methane, is perforated and is starting to leak seven to eight million tonnes of methane each year into the atmosphere.