Polar Vortex. What? Why? How?
Polar Vortex. Phrase of the Week! Scientists tell us it’s always been there and it’s always strongest in the winter. So what’s new about this year’s cold snap? Well the strong indications are that, ironically, it’s the warming of the planet that’s causing this phenomenon to impact on populated areas of the Northern Hemisphere in more and more extreme ways. This week we take a look with the help of a couple of scientific commentators.