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Active‐Layer Thickness Measurements Using a Handheld Penetrometer at Boreal and Tundra Sites in Eastern Siberia

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  • Yoshihiro Iijima
  • Hotaek Park
  • Pavel Ya. Konstantinov
  • Grigory G. Pudov
  • Alexander N. Fedorov

Abstract

Active‐layer thickness (ALT) is one of the most robust measures used to assess the impact of climate change on terrestrial permafrost. Testing of a handheld dynamic cone penetrometer showed that it was capable of measuring ALT with the same level of accuracy as conventional methods in boreal and tundra sites in eastern Siberia. The penetrometer also characterised the vertical structure of ground hardness within the active layer. The vertical profile of penetrometer measurements corresponded closely with soil plasticity and the liquid limit in high‐centred polygons produced by thermokarst subsidence in dry grassland areas at a boreal site at Churapcha. The ALT was markedly deeper (>70 cm) at gravelly slope points adjacent to a wet tundra plain (

Suggested Citation

  • Yoshihiro Iijima & Hotaek Park & Pavel Ya. Konstantinov & Grigory G. Pudov & Alexander N. Fedorov, 2017. "Active‐Layer Thickness Measurements Using a Handheld Penetrometer at Boreal and Tundra Sites in Eastern Siberia," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 28(1), pages 306-313, January.
    • Handle: RePEc:wly:perpro:v:28:y:2017:i:1:p:306-313
    DOI: 10.1002/ppp.1908
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