A chilling possibility
In a 2003 report, Robert Gagosian cites "rapidly advancing evidence [from, e.g., tree rings and ice cores] that Earth's climate has shifted abruptly and dramatically in the past." For example, as the world warmed at the end of the last ice age about 13,000 years ago, melting ice sheets appear to have triggered a sudden halt in the Conveyor, throwing the world back into a 1,300 year period of ice-age-like conditions called the "Younger Dryas." It is also now known that the Gulf Stream weakened in 'Little Ice Age'
On 6 December 2005 Michael Schlesinger, a professor of atmospheric sciences at the University of Illinois at Urbana-Champaign, leading a research team, said "The shutdown of the thermohaline circulation has been characterized as a high-consequence, low-probability event. Our analysis, including the uncertainties in the problem, indicates it is a high-consequence, high-probability event." See also: Failing ocean current raises fears of mini ice age.
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