By Michael Kuhne,
Staff Writer for AccuWeather.com
AccuWeather-(ENEWSPF)- AccuWeather reports longer, harsher winters may be in store for the portions of North America as the polar vortex continues to weaken and shifts, according to a new study.
The polar vortex is a large pocket of frigid air that hovers above the polar regions, and is most prominent in the winter months.
Researchers at China’s Lanzhou University penned the study, which was…
