“during the sunless winter, a heatwave raised concerns that the polar vortex may be eroding.
“during the sunless winter, a heatwave raised concerns that the polar vortex may be eroding.
early 2014 north american cold wave:7
early 2014 north american cold wave
the polar vortex beginning on january 2, 2014, sudden stratospheric warming (ssw)[dubious – discuss] led to the breakdown of the semi-permanent feature across the arctic known as the polar vortex.