New Scientist: THE ocean is being stirred up like a fizzy drink. A stormier Arctic could fast-track methane gas into the atmosphere, potentially accelerating global warming. Working off the east Siberian coast, Natalia Shakhova of the University of Alaska in Fairbanks and colleagues drilled into the bed of the Laptev Sea a hotspot of methane emissions and used sonar to analyse gas bubbles in the water. They found the permafrost that usually sat beneath the seabed had thawed, allowing 500 kilograms of methane...