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Nature 451, 286-288 (17 January 2008) | doi:10.1038/nature06590; Published online 16 January 2008

Ocean circulation in a warming climate

J. R. Toggweiler1 & Joellen Russell2

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Climate models predict that the ocean's circulation will weaken in response to global warming, but the warming at the end of the last ice age suggests a different outcome.

There is an old truism in climate circles that the cold climate at the Last Glacial Maximum (LGM), which occurred 21,000 years ago, had stronger winds. This idea fits with the common observation that it is windier in the winter than in the summer because there is greater thermal contrast within the atmosphere in the winter hemisphere.

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