Arctic tundra dominated by tussock cotton-grass (Eriophorum vaginatum) with reddish peat moss (Sphagnum rubellum) peat patches on a hillslope at Imnavait Creek (Toolik LTER)on the North Slope, Alaska.

image: Arctic tundra dominated by tussock cotton-grass (Eriophorum vaginatum) with reddish peat moss (Sphagnum rubellum) peat patches on a hillslope at Imnavait Creek (Toolik LTER)on the North ...

The news that the frigid Arctic tundra ringing the polar region has switched from being a net absorber, or "sink," of planet-warming greenhouse gases to a net emitter, or "source," indicates the ...

Lightning and fires on the Arctic tundra seem to be on the rise. Jane Qiu meets the researchers learning from the scorched earth in Alaska.

Natalie Boelman: Arctic sea at lowest extent recorded, affecting Earth's ability to cool. But, she says, change to sea's neighboring tundra ecosystem is also a big global-warming worry ...

Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy, and rainfall is scant. Tundra lands are covered with snow for much of ...

As the Arctic tundra warms, soil microbes likely will ramp up CO 2 production. ... The tundra is “a sleepy biome,” says Sybryn Maes, an environmental scientist at Umeå University in Sweden.

But warming air temperatures in the Arctic are breaking down permafrost across the tundra, in some cases, severely. The Arctic report, for example, showed Alaskan permafrost temperatures in 2024 ...

The Arctic tundra is warming up and that's causing long-frozen ground to melt as well as an increase in wildfires. The region is "now emitting more carbon that it stores, which will worsen climate ...

The Arctic permafrost region as a whole — which encompasses tundra and forests — has become carbon neutral over the past 20 years, meaning it’s neither absorbing nor releasing excess CO2 ...