Articles | Volume 17, issue 5
https://doi.org/10.5194/tc-17-1803-2023
https://doi.org/10.5194/tc-17-1803-2023
Research article
 | 
03 May 2023
Research article |  | 03 May 2023

Permafrost degradation at two monitored palsa mires in north-west Finland

Mariana Verdonen, Alexander Störmer, Eliisa Lotsari, Pasi Korpelainen, Benjamin Burkhard, Alfred Colpaert, and Timo Kumpula

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Latest update: 21 Jul 2024
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Short summary
The study revealed a stable and even decreasing thickness of thaw depth in peat mounds with perennially frozen cores, despite overall rapid permafrost degradation within 14 years. This means that measuring the thickness of the thawed layer – a commonly used method – is alone insufficient to assess the permafrost conditions in subarctic peatlands. The study showed that climate change is the main driver of these permafrost features’ decay, but its effect depends on the peatland’s local conditions.