Origin and polycyclic behaviour of tundra thaw slumps, Mackenzie Delta region, Northwest Territories, Canada
Canada ; Cold area ; Delta ; Mass movement ; Northwest Territories ; Periglacial features ; Permafrost ; Soil temperature ; Thawing ; Thermokarst ; Tundra
The focus of this paper is the tundra uplands east of the Mackenzie Delta. The AA. describe the influence of thaw slumping on ground thermal conditions in tundra environments and examines the role of warming permafrost on talik enlargement
as a mechanism driving the polycyclic behaviour of lakeside thaw slumps. The linkage between polycyclic thaw slump activity and talik expansion was investigated by : 1) examining the frequency of association between active slumps and areas of previous disturbance
Active layer ; Canada ; Climate ; Climatic index ; Climatic variability ; Cold area ; Interannual variability ; Northwest Territories ; Organic materials ; Periglacial features ; Permafrost ; Soil moisture ; Summer ; Thawing ; Valley
In this paper, results from active-layer probing on grids and thaw tubes are presented and spatial and temporal variations discussed in the context of local site characteristics and measurement methodologies. The AA. address 2 important questions