Global Warming feedback loop

A Russian professor working at the University of Alaska says that the methane releases from both arctic tundra and arctic methane hydrate are larger than previously thought. He's not particularly alarmist, but calls for more study to verify his data.

(A runaway methane release feedback is the horror case of global warming as warmer temperatures free up more of the frozen methane. warming temperatures, releasing still more methane, etc. In theory, it could precipitate a rapid (generation or two) and massive temperature rise.)