The Arctic tundra, a critical “carbon sink” for ... by rising surface air temperatures is resulting in a range of ecosystem changes that are leading to increased emissions in the region ...

The Arctic tundra is now emitting more carbon dioxide ... emphasizing numerous changes affecting both ecosystems and human communities. The thawing permafrost is a significant factor in this ...

From Alaska to Siberia, the Arctic is changing so rapidly that there is no "normal" there now, scientists warn. The consequences reach across the globe. The Arctic tundra now releases more carbon ...

"Our observations now show that the Arctic tundra ... impacts on ecosystems cannot be reversed." Warmer temperatures are impacting wildlife too, with the report finding tundra caribou numbers ...