Biogeosciences
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Articles | Volume 23, issue 11
Articles | Volume 23, issue 11
https://doi.org/10.5194/bg-23-3777-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-3777-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 11
Research article
 | 
10 Jun 2026
Research article |  | 10 Jun 2026

Addition of brackish water to tundra soils does not inhibit methane production: implications for Arctic coastal methane production

Alexie Roy-Lafontaine, Rebecca Lee, Peter M. J. Douglas, Dustin Whalen, and André Pellerin

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Latest update: 18 Oct 2026
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Short summary
Arctic coastlines are eroding and flooding as the climate warms, but their role in releasing methane, a potent greenhouse gas, is not well understood. We collected soil and sediment samples near Tuktoyaktuk, Canada, and tested methane production when exposed to seawater in laboratory incubations. We expected seawater to suppress methane production, but coastal soils instead produced more methane than inland sites. Arctic coasts may therefore be an overlooked source of methane to the atmosphere.
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