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It is a mode of atmospheric circulation in which the stratosphere is unusually warm and westerly winds, which normally bring warmth from the oceans to northern Europe, are unusually weak.
ECONOMIST: Britain��s cold snap is explained by the Arctic oscillation
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At present, the conveyor depends on surface water sinking and travelling towards the equator, there to rise again and bring warmth back to the north (see map in the introduction).
ECONOMIST: A meltdown tinged with acid
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Hopefully, the weather will continue to get warmer and Sam won't need to put an hour of prayers in and just keep to the mandatory half an hour a day that a sun worshipper must complete to bring warmth to the country and as an additional bonus receive an all-year round tan.
BBC: Clive Stuart-Smith column