. . . . Most scientists involved in research on this topic agree that the culprit is global warming, melting the icebergs on Greenland and the Arctic icepack and thus flushing cold, fresh water down into the Greenland Sea from the north. When a critical threshold is reached, the climate will suddenly switch to an ice age that could last minimally 700 or so years, and maximally over 100,000 years.
And when might that threshold be reached? Nobody knows – the action of the Great Conveyor Belt in defining ice ages was discovered only in the last decade. Preliminary computer models and scientists willing to speculate suggest the switch could flip as early as next year, or it may be generations from now. It may be wobbling right now, producing the extremes of weather we've seen in the past few years.
What's almost certain is that if nothing is done about global warming, it will happen sooner rather than later.
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http://www.alternet.org/story.html?StoryID=17711>
Pardon my pun, but this article is literally chilling...