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July 26, 2026Arctic Antarctic and Alpine ResearchOpen Access

Spatiotemporal landscape dynamics drive organic matter mobilization and degradation in thermokarst terrain of the southern continuous permafrost zone

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Authors

LELars EbelFSFabian SeemannGGGuido Grosse

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Overview

Randomized trial assesses organic matter dynamics in thermokarst terrains, indicating climate impacts on carbon cycles.

Key Points

  • The research aims to understand how thermokarst processes affect organic matter dynamics in permafrost regions due to climate change.
  • Analyzed 70 years of aerial imagery (1952–2022) for landscape changes in northwest Alaska.
  • Conducted biogeochemical investigations of sediment cores up to 1 meter deep.
  • Assessed the effects of thaw slump and lake drainage on organic matter mobilization.
  • Identified two trajectories of organic matter mobilization: degradation beneath lakes and erosion from thaw slumps.
  • Taliks under drained lake basins have not refrozen for about 60 years, resulting in increased organic matter degradation.
  • Refrozen drained lake basins currently sequester organic matter but are at risk of future degradation due to thaw.

Cite This Study

Ebel et al. (2026) studied this question.

synapsesocial.com/papers/6a65a551d3aea3239cd776d9https://doi.org/10.1080/15230430.2026.2697545
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