"Polar vortex", polar melt, jet streams, extreme weather, some explanations

Cornell’s Charles H. Greene, professor of earth and atmospheric sciences, and Bruce C. Monger, senior research associate in the same department, detail this phenomenon in a paper published in the June issue of the journal Oceanography. “Everyone thinks of Arctic climate change as this remote phenomenon that has little effect on our everyday lives,” Greene said. “But what goes on in the Arctic remotely forces our weather patterns here.”