There is no sun light for months in Arctic winter. Usually jet streams/polar vortex keep the cold air within the high latitudes. Due to Climate Change or more s

There is no sun light for months in Arctic winter. Usually jet streams/polar vortex keep the cold air within the high latitudes. Due to Climate Change or more specific Arctic Amplification the pressure gradient from the Equator to the North Pole flattens and tends to fail to contain the cold air which in turn can 'escape' to lower latitudes in exchange for warmer air moving into the Arctic. The whole northern hemisphere trends towards a less structured more chaotic circulation regime.