NEW YORK - The rapid warming of the Arctic, a definitive sign of climate change, is occurring even faster than previously described, researchers in Finland said Thursday .
"One has to measure it much better, and all the time, because we are at the precipice of many tipping points," like the complete loss of Arctic sea ice in summers, he said. If the rate of warming in the Arctic continues to speed up, the influence on weather could worsen, one of the researchers said. And projections of future climate impacts might need to be adjusted, said Mr Mika Rantanen, a researcher at the Finish Meteorological Institute in Helsinki.
"We were frustrated by the fact that there's this saying that the Arctic is warming twice as fast as the globe," he said."But when you look at the data, you can easily see that it is close to four." The new analysis begins with data from 1979, when accurate temperature estimates from satellite sensors first became available. The researchers also defined the Arctic as the area north of the Arctic Circle, above about 66 degrees latitude.
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