Biogeosciences
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Articles | Volume 23, issue 4
Articles | Volume 23, issue 4
https://doi.org/10.5194/bg-23-1459-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-1459-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 4
Research article
 | 
24 Feb 2026
Research article |  | 24 Feb 2026

Enhanced methane cycling across the Laptev Sea signaled by time-integrated biomarkers of aerobic methane oxidation

Albin Eriksson, Birgit Wild, Wei-Li Hong, Henry Holmstrand, Francisco J. A. Nascimento, Stefano Bonaglia, Denis Kosmach, Igor Semiletov, Natalia Shakhova, and Örjan Gustafsson

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Short summary
Thawing subsea permafrost in the East Siberian Arctic Seas releases methane, a potent greenhouse gas. Using molecular fossils in sediments, we traced aerobic methane oxidation as a proxy of enhanced methane cycling across the Laptev Sea, including in regions once thought low in emissions. This approach captures long-term patterns of methane cycling over years-decades , overcoming limits of short-term seawater measurements and highlights the importance of the Laptev Sea in Arctic methane cycling.
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