[ . . . ]
But before we write off our current cold snap as the British weather
playing its usual tricks, we still need to explain why the Arctic high
pressure has strayed so far south. And here, says Prof Maslin, is the
more likely, and more subtle, link with climate change. "For me," he
says, "this shows that the climate is becoming more dynamic, and thus
large shifts in the wind patterns are possible – in this case, sub-
tropical air being trapped further south than usual."
In other words, we need to remember that while the average temperature
is rising, climate change also delivers more extreme weather, from
chills to heatwaves. Today, we're stocking up on snowshoes – but best
to invest in some air-conditioning as well.


http://www.telegraph.co.uk/earth/env...l-warming.html