Mass movement by solifluction and syngenetic dynamic of permafrost in the High Arctic, Canadian High Arctic

Hypothesis: 1) The deepening of the active layer, in response to climate changes, accentuate mass movements by solifluction; 2) Solifluction lobes' movement lead to the development of a syngenetic permafrost and aggradational ice downslope; 3) Because of the important effect of latent heat represented by the ice volume, this ice-rich zone would contribute to slow down permafrost thaw in response to climates changes. Objectives: 1) Characterize solifluction lobes cryostratigraphy; 2) Determine if the mass movement of sediments induces ice aggradation and syngenetic development of permafrost downslope. Methodology : 1) The solifluction lobes cryostratigraphy is examined with permafrost cores and with ground penetrating radar surveys; 2) The different components of permafrost (sediments, ice, organic matter and gas) are determined by computer assisted tomography (INRS-ÉTÉ); 3) The geotechnical properties (grain size, Atterberg limit, thaw settlement, porosity, hydraulic conductivity and shear strength) of permafrost are measured in laboratory; 4) To draw a profile of the solifluction lobes and to calculate their volume, a 3D scanning and a topographic survey has been done with a Trimble VX total station.

Metadata Access
Creator Manuel Verpaelst;Daniel Fortier
Publisher Canadian Cryospheric Information Network
Contributor University of Montreal
Publication Year 2014
Rights Public
Language English
Discipline Environmental Research
Spatial Coverage (83N,74W)
Temporal Coverage Begin 2013-06-01T11:59:59Z
Temporal Coverage End 2013-07-27T11:59:59Z