El Nino gets all the headlines as result of the impact it has on North and South American weather. However it is the North Atlantic Oscillation
(NAO) that has bigger impact on European weather ?
The NAO is basically an index recording seasonal pressure difference between the stable Azores high and Icelandic low in northern Europe. An exceptionally -ve NAO probably played a big role in the unusually cold 2010 winter we experienced in Scotland ?
Several studies have claimed that melting sea ice in the arctic means that Europe is more likely to experience northerly, rather than prevalent Atlantic westerly, weather systems (i.e -ve NAO). Which of course means a higher chance of colder winters, in the short term at least.
Edited 2 times. Last edit at 10.13hrs Wed 20 May 15 by Doug_Bryce.