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

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 tun...

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Bibliographic Details
Published in:Permafrost and Periglacial Processes
Main Authors: Yoshihiro Iijima, Hotaek Park, Pavel Ya. Konstantinov, Grigory G. Pudov, Alexander N. Fedorov
Format: Article in Journal/Newspaper
Language:unknown
Subjects:
Churapcha
Active layer thickness
permafrost
Thermokarst
Tundra
Siberia
Online Access:https://doi.org/10.1002/ppp.1908
Description
Summary: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 (

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