Two instrument-laden buoys ("Knoll" and "Tott") were recently released north of Svalbard, soon to disappear beneath the ice. 

A new study in Nature collects large datasets from tundra around the world, showing how reveals how a warming climate might shift the tundra environment from a carbon sink to a carbon source.

A new study shows that the recent Arctic warming compares to abrupt climate change events in the distant past.