This article discusses how climate change is affecting the polar vortex.
If it seems as if these polar freezes are happening more often, you’re right. “They are definitely becoming more common,” said Jennifer Francis, a senior scientist at the Woods Hole Research Center. “There have been a couple of studies that have documented that.”
The cold snap may feel especially shocking after an unusually warm few weeks. Colder temperatures have been arriving later in winter over the past few years, according to Judah Cohen, a climatologist at Atmospheric and Environmental Research, a weather risk assessment firm. But because of changes to the polar vortex, when wintry weather does arrive, it’s often more intense — witness the four back-to-back nor’easters last year.