Perhaps the best analogy yet for the insane cold weather now afflicting the US came from science blogger Greg Laden, who created the viral image above. “Go home, Arctic,” it reads. “You’re drunk.”
When it comes to the reason why the United States is currently experiencing life-threatening cold—with temperatures in the negative-20s in the Upper Midwest, and wind chills much lower than that—that’s actually not so far from the truth. “It’s basically the jet stream on a drunken path going around the Northern Hemisphere,” explains Rutgers University climate scientist Jennifer Francis. In other words, we’re experiencing record-breaking cold temperatures because a wavy and elongated jet stream has allowed frigid Arctic air to travel much farther south than usual.
And according to Francis’ research—which has drawn increasing attention in the past few years—we’re seeing more of just this kind of jet stream behavior, thanks, at least in part, to the rapid warming of the Arctic.
US President Barack Obama, in his 2012 nomination acceptance speech tonight at the Democratic National Convention.
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