Extreme blasts of cold weather hitting Europe and the USA are NOT caused by a warming Arctic changing the way the jet stream moves

Daily Mail

Extreme blasts of freezing weather hitting Europe and the USA in recent years aren't caused by a warming Arctic changing the jet stream, as previously thought. 

Research by the University of Exeter disputes earlier studies suggesting a warming Arctic was creating a 'wavier' jet stream and linked to climate change.

They found it's more likely the other way around with random fluctuations in the jet stream warming up the Arctic over decades."