Why so hot so early in the summer?
Average temperatures in the high Arctic have been climbing quickly, in step with our copious greenhouse gas emissions. Since December, air temperatures in the Russian Arctic have been nearly 11°F higher than the average seen over the past four decades. And as our Craig Welch reported in 2018, warming in the Arctic can potentially lead to a dangerous feedback loop, in which the region’s permafrost is no longer frosty on a permanent basis. In this scenario, some scientists worry that greenhouse gases long trapped in the frozen soil might escape, further exacerbating climate change. (Above, ground collapses at a permafrost megaslump in northern Siberia.)
Based on our best climate modeling, if warming continues unabated, records like the one