Climate change is causing widespread permafrost thaw in the Arctic. Measurements at 33 Arctic lakes show that old carbon from thawing permafrost is being emitted as methane, though emission rates have not changed during the past 60 years.
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JONAS ÅKERMAN
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Christensen, T. It's a gas. Nature Geosci 9, 647–648 (2016). https://doi.org/10.1038/ngeo2803
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DOI: https://doi.org/10.1038/ngeo2803
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