A study shows that warming the Arctic due to climate change has increased the number of polar vortex outbreaks, while cold winds from the far north bathe the central and eastern United States in the killer cold.
The study, published Thursday in the journal Science, is the first to show a link between changes in the polar region and the freezing of Valentine’s Week in February, which led to a major power outage. TexasMore than 170 people were killed and at least ارب 20 billion was lost.
Polar vortices usually trap icy winds. Arctic. But the hot air weakens the whirlpool, causing it to expand and rotate south. Joda Cohen, a winter hurricane expert in environmental research at a Boston-based business firm, said it has more than doubled the number of times it has weakened each year since the early 1980s.
“It’s paradoxical that warmer temperatures could lead to an increase in cold somewhere south of the Arctic Texas, but the lesson from our analysis is that unpredictability can be expected with climate change,” Cohen said.
Climate scientists are still debating how and why global warming is affecting images of cold – they know it’s reducing the total number of cold days, but they’re still Trying to figure out if it increases the depth of the cold.
Cohen’s study first uses the measurement of changes in the atmosphere to explain a phenomenon for which it was difficult to calculate climate models.
Cohen’s study “provides a potentially simple explanation of what is happening,” said Michael Mann, a meteorologist at Pennsylvania State University who was not part of the study.
Cohen was able to explain how there has been a dramatic difference in warming within the Arctic, which drives how polar vortices can spread and weaken.
When the area north of England and around Scandinavia is warmer than the area around Siberia, it spreads the polar vortex to the east, and the cold wind blows from the north of Siberia to the polar region and then to the south of Central America. And moves to the eastern part.
Jennifer Francis, a climate scientist at the Woodwell Climate Research Center in Cape Cod, said, “The Texas Cold Blast of February 2021 is the link between a changing Arctic and cold eruptions in the lower latitudes. I helped but she was not part of Cohen’s research. “The study takes this controversial hypothesis and leads it to a strongly accepted science.”