Why’s it been so cold?

If you didn’t know, Britain’s been a tad on the chilly side recently. Even all the way down here in Exeter it’s almost reached -17°C.

So why has it been so teeth chatteringly cold? Well, I’m going to answer this with the basic and limited knowledge I already have. It depends on a number of factors. The big factor is the jet stream. A fast moving belt of wind high up in the atmosphere. I won’t go into the physics of how, why and what’s going on but the stream sometimes moves and meanders here and there, much like a river.

This moves for several different reasons. The Sun also has an effect of the jet stream, and this is what a lot of people think may have happened recently – the flood in Pakistan and so on.  Continue reading