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Permafrost Thaw and Wildfires Are Raising CO2 Emissions in Arctic Tundras

Learn about hotspots in tundras and boreal forests that are releasing higher level of carbon dioxide, altering the carbon balance in the world's coldest regions.

ByJack Knudson
(Credit: Troutnut/Shutterstock) Troutnut/Shutterstock

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Climate change has already begun to instigate environment-altering effects around the world, and the latest evidence is cropping up in arctic regions that are emitting increasing amounts of carbon dioxide. Researchers in a new study published in Nature Climate Change, have measured the flow of carbon in the Arctic-boreal zone (ABZ) — consisting of the treeless tundra, boreal forests, and wetlands in northern latitudes — and found that a shifting dynamic is underway.

These environments were once mostly carbon dioxide sinks, meaning they absorbed more atmospheric CO2 than they released. The majority of the ABZ still acts as a sink, but now, some spots have started to become significant carbon sources.

In the new study, an international research team led by the Woodwell Climate Research Center assessed a collection of carbon flux data spanning from 1990 to 2020, taken from 200 sites in the ABZ. They found that 34 percent ...

  • Jack Knudson

    Jack Knudson is an assistant editor at Discover with a strong interest in environmental science and history. Before joining Discover in 2023, he studied journalism at the Scripps College of Communication at Ohio University and previously interned at Recycling Today magazine.

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