Articles | Volume 20, issue 9
https://doi.org/10.5194/tc-20-5271-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-5271-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Sep 2026
Research article |
| 21 Sep 2026
| 21 Sep 2026
Accelerated lowland thermokarst development revealed by UAS photogrammetric surveys in the Stordalen mire, Abisko, Sweden
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Thomas Moenaert
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Julien Radoux
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Baptiste Delhez
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Eléonore du Bois d'Aische
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Maëlle Villani
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Catherine Hirst
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Department of Earth Sciences, Durham University, Durham, UK
Erik Lundin
Abisko Scientific Research Station, Swedish Polar Research Secretariat, Abisko, Sweden
François Jonard
Earth Observation and Ecosystem Modelling Laboratory, Université de Liège, Liège, Belgium
Sébastien Lambot
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Kristof Van Oost
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Veerle Vanacker
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
Soil Geography and Landscape Group, Wageningen University & Research, Wageningen, the Netherlands
Matthias B. Siewert
Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden
Carl-Magnus Mörth
Department of Geological Sciences, Stockholm University, Stockholm, Sweden
Michael W. Palace
Department of Earth Sciences and Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Ruth K. Varner
Department of Geological Sciences, Stockholm University, Stockholm, Sweden
Department of Earth Sciences and Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Franklin B. Sullivan
Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Christina Herrick
Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
Sophie Opfergelt
Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
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Short summary
This study examines the rate of permafrost degradation, in the form of the transition from intact well-drained palsa to fully thawed and inundated fen at the Stordalen mire, Abisko, Sweden. Across the 14 hectares of the palsa mire, we demonstrate a 10-fold acceleration of the degradation in 2019–2021 compared to previous periods (1970–2014) which might lead to a pool of 12 × 10³ kg of organic carbon exposed annually for the topsoil (23 cm depth).
This study examines the rate of permafrost degradation, in the form of the transition from...
