Thermal behaviour of retrogressive thaw slumps over time revealed by ERT - an example from Herschel Island, Canada


Contact
Michael.Fritz [ at ] awi.de

Abstract

In the last century the number of retrogressive thaw slumps has doubled in some arctic regions, e.g. Herschel Island, Yukon Territory, Canada [Lantuit and Pollard, 2008]. Retrogressive thaw slumps are a common thermocarst landform along the coast of Herschel Island [Lantuit and Pollard, 2005]. However mechanical conditions leading to the evolution of those retrogressive thaw slumps are poorly understood. For a better understanding of internal thermal processes in these retrogressive thaw slumps we implemented different electrical resistivity profiles (ERT). They cross the focused thaw slump longitudinally and transversally. We compared about 2 km of new ERT-data from 2019 with the same transects from 2011 to gain information about the temperature distribution and the temperature changes in the slump ground. The aim for our study is to gain a profound understanding of the strong and deep thermal disturbances generated by retrogressive thaw slumps and how they change over time, leading to a possible polycyclicality of these slumps.



Item Type
Conference (Talk)
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Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
European Geosciences Union General Assembly, 04 May 2020 - 08 May 2020, Vienna, Austria.
Eprint ID
52039
DOI 10.5194/egusphere-egu2020-17801

Cite as
Eppinger, S. , Krautblatter, M. , Lantuit, H. and Fritz, M. (2020): Thermal behaviour of retrogressive thaw slumps over time revealed by ERT - an example from Herschel Island, Canada , European Geosciences Union General Assembly, Vienna, Austria, 4 May 2020 - 8 May 2020 . doi: 10.5194/egusphere-egu2020-17801


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