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Thawing permafrost and thicker active layers in sub‐arctic Sweden

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  • H. Jonas Åkerman
  • Margareta Johansson

Abstract

Observations of active‐layer thickness from nine sites with up to 29 years of gridded measurements located in the Torneträsk region, northernmost Sweden, were examined in relation to climatic trends. Mean annual air temperatures in this area have warmed and recently rose above 0°C. Active layers at all sites have become thicker, at rates ranging from 0.7 to 1.3 cm per year. This trend has accelerated in the past decade, especially in the westernmost site where rates have reached 2 cm per year and permafrost has disappeared at 81 per cent of the sampling points. Increased active‐layer thicknesses are correlated with increases in mean summer air temperature, thawing degree‐days and, in five of the nine sites, with increases in snow depth. Copyright © 2008 John Wiley & Sons, Ltd.

Suggested Citation

  • H. Jonas Åkerman & Margareta Johansson, 2008. "Thawing permafrost and thicker active layers in sub‐arctic Sweden," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 19(3), pages 279-292, July.
  • Handle: RePEc:wly:perpro:v:19:y:2008:i:3:p:279-292
    DOI: 10.1002/ppp.626
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    Cited by:

    1. Sarah M. Strand & Hanne H. Christiansen & Margareta Johansson & Jonas Åkerman & Ole Humlum, 2021. "Active layer thickening and controls on interannual variability in the Nordic Arctic compared to the circum‐Arctic," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 32(1), pages 47-58, January.
    2. Komi S Messan & Robert M Jones & Stacey J Doherty & Karen Foley & Thomas A Douglas & Robyn A Barbato, 2020. "The role of changing temperature in microbial metabolic processes during permafrost thaw," PLOS ONE, Public Library of Science, vol. 15(4), pages 1-20, April.
    3. Aleksandr Zhirkov & Maksim Sivtsev & Vasylii Lytkin & Anatolii Kirillin & Antoine Séjourné & Zhi Wen, 2023. "An Assessment of the Possibility of Restoration and Protection of Territories Disturbed by Thermokarst in Central Yakutia, Eastern Siberia," Land, MDPI, vol. 12(1), pages 1-17, January.

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