News reports cast the polar vortex as a previously unknown phenomenon that had suddenly descended upon the country. “What is the polar vortex and why is it doing this to us?” asked NPR ...

The main polar vortex is a circulation of air enveloping ... He has provided commentary on climate science and policy for Sky News, CBC Radio, NPR, Al Jazeera, Sirius XM Radio, PBS NewsHour ...

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

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