The Misbehaving Jet Stream
Scientists from Columbia University believe that global warming will cause the mid latitude jet stream to move northwards.
Meanwhile, this winter, the jet stream has moved decidedly south of where it normally would be, bringing unusually wet weather to southern England.
And as the Met Office explain, the jet stream marks the border, where cold Arctic air meets warm tropical air. In winter, the jet stream tends to move south from its summer position, as the colder Arctic air dominates. [...]
All of this points to the fact it is a cold Arctic air which is fuelling the jet stream , and pushing it south.
Junk scientists will try and tell you it is because of “melting Arctic ice”.