Since the Ice Ages, the Polar Vortex has acted as a climatic gatekeeper. When breached, it unleashes freezing air into regions unprepared for it. This decade, those breaches are becoming more frequent ...

Data from a polar vortex splitting during 2002’s Southern Hemisphere sudden warming event helps expand models to accommodate ...

The deadly cold front was tied to a misshapen Arctic polar vortex. In the winter, this mass of air swirling above the North Pole can push deadly winter weather into southern latitudes. Photograph ...

More than half of all the stations have had their highest ever mean maximum temperatures for spring and the majority of all ...