Scientists warn that methane trapped beneath the Greenland ice sheet could intensify climate warming as the ice melts, releasing the potent greenhouse gas into the atmosphere at accelerating rates.

Caucasian glaciers have lost a quarter of their surface area to climate change since the millennium. “We don’t have winters here anymore,” said Sergei Nureddinov, a guest house owner in the mountaintop village of Verkhniy Kani, gesturing to the glacier from his front yard. “The climate catastrophe is here.”

A previously unknown source of the strong greenhouse gas nitrous oxide has been found in East Siberian Yedoma permafrost. Published in Nature Communications today, the observation was made by an international group of researchers, with the lead of researchers from the University of Eastern Finland.

The glacier advanced just over 3.5 miles and moved about 65 feet per day earlier this year. Studying the surge involved a massive undertaking.

The glaciologists from Moscow came too late to see the MGU glacier in the North Ural.

Asian glaciers are set to shrink by at least a third by 2100 due to climate change, researchers said on Thursday, threatening the millions who depend on their meltwaters for drinking and farming.