Arctic tundra, which has stored carbon for thousands of years, has now become a source of planet-warming pollution. As wildfires increase and hotter temperatures melt long-frozen ground, the region is ...

Foreboding environmental milestones abounded again this year in the Arctic, where experts say dramatic climate shifts are fundamentally altering the ecosystem and how it operates. One recent turning ...

Arctic tundra, which has stored carbon for thousands of years, has now become a source of carbon dioxide. The new research, led by scientists at the Woodwell Climate Research Center in Falmouth, ...

The Arctic is rapidly changing from the climate crisis, with no "new normal," scientists warn. Wildfires and permafrost thaw are making the tundra emit more carbon than it absorbs. From beaver ...

This was the Arctic’s second-hottest year on record, according to a new NOAA report. The tundra has become a source of emissions, rather than a carbon sink, the authors said. The Arctic is heating up ...

Tundra plants can eek out an existence in the very short summers of the Canadian High Arctic such as here on Ellesmere Island, Nunavut. (Anne Bjorkman, University of Gothenburg) Rapid climate change ...

A group of muskoxen gather on the Arctic tundra near Kangerlussuaq, Greenland. (Jeff Kerby) The story of Arctic greening has overlooked some main characters. At center stage are climate change and ...

Add Yahoo as a preferred source to see more of our stories on Google. Foreboding environmental milestones abounded again this year in the Arctic, where experts say dramatic climate shifts are ...