The average summer temperature in the eastern Canadian Arctic is higher than in any previous century in the past 44,000 years — and perhaps the highest in 120,000 years — reflecting what scientists call an unprecedented warming of the region due to climate change, according to a new study by the University of Colorado, Boulder. “This study really says the warming we are seeing is outside any kind of known natural variability, and it has to be due to increased greenhouse gases in the atmosphere,” Gifford Miller, a study leader, said in a joint statement from the school and the publisher of the journal Geophysical Researcher Letters , which published the findings this week. The study, according to the statement, presents the first direct evidence that the present warmth in the Canadian Arctic exceeds the peak warmth there when Earth’s last glacial period ended, about 11,700 years ago. In […]