View all New York Times newsletters. So a spell of extremely cold weather like the recent one is rare, about 15 times rarer than a century ago, the scientists said. “Although this cold spell would not have been unusual before global warming, it is now a relatively rare event in any one region,” the study’s authors, from a loose-knit international group called World Weather Attribution, wrote. Advertisement Continue reading the main storyPut another way, the most intense cold waves are on average about 4 degrees Fahrenheit (2 degrees Celsius) warmer now than previously, they said. Photo“The trend in general for these cold waves is that they’re warming,” said Claudia Tebaldi, a research fellow with Climate Central, a news organization that focuses on climate science and coordinated the study.

Source: New York Times January 11, 2018 18:45 UTC