By Paul Homewood
The claims that the Polar Vortex, that has brought the cold winter in the States and wet weather to Britain, is linked to global warming are based on the theory of a weaker jet stream. The idea is that,as the Arctic warms, the temperature differential between high and mid latitudes decreases. As the jet steam is powered by this differential, the theory goes, the jet stream is liable to turn from a powerful polar or zonal flow to a slower meridional one.
Just imagine a slow moving river, and think of how it meanders in comparison to a fast moving one. The theory sounds superficially attractive, until one realises that such events have occurred regularly in the past.
Back in 1975, C C Wallen, Head of the Special Environmental Applications Division of the World Meteorological Organization, had this to say about the consequences of the cooling trend…
View original post 212 more words