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

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

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

He said that, last summer, her "warmth and charisma helped bring the country together as we celebrated in Team GB and Paralympic GB's success".

BBC: Clare Balding to receive Bafta

She tells them to bring their cheeks up higher and pull their whole face upward, and she makes sure the eyes show the warmth of a sincere Duchenne smile.

WSJ: Stress-Busting Smiles