Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 23
Articles | Volume 22, issue 23
https://doi.org/10.5194/bg-22-7881-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-7881-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 23
Research article
 | 
10 Dec 2025
Research article |  | 10 Dec 2025

Enhanced CO2 emissions driven by flooding in a simulation of palsa degradation

Mélissa Laurent, Mackenzie R. Baysinger, Jörg Schaller, Matthias Lück, Mathias Hoffmann, Torben Windirsch, Ruth H. Ellerbrock, Jens Strauss, and Claire C. Treat

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Short summary
Palsas are peat permafrost mounds underlain by ice-rich permafrost. Due to climate change, they could disappear by the end of the century. When palsas thaw, changes occur in hydrological conditions affecting the carbon (C) cycle. In our study, we simulated permafrost thaw under different water treatments using 1-meter soil columns from a palsa. We measured CH4 and CO2 emissions for 3-month incubation. Our results show that following thaw, flooding the cores leads to increased CO2 emissions.
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