CGRG Bibliography of Canadian Geomorphology
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Author : Dyke, L.D.
Date : 2001.
Title : Shoreline permafrost along the Mackenzie River.
Publication : The Physical Environment of the Mackenzie Valley: a Baseline for the Assessment of Environmental Change, Edited by: L.D. Dyke and G.R. Brooks. Geological Survey of Canada, Bulletin
Issue : 547:
Page(s) : 143-151.
Abstract
Shorelines mark one of the most abrupt changes in ground temperature in permafrost regions. The ground temperature in the vicinity of shorelines is controlled by the contrast in mean annual temperature between the particular water body and the adjacent land. Erosion or sedimentation along shorelines complicates ground temperatures by moving the boundary between relatively cold land and warmer water. A river channel migrating due to erosion on the outside of a bend introduces the relatively warm water condition to frozen ground, causing thaw to begin. At the same time, sediment is deposited on the opposite shore as the migration progresses. This results in ground temperatures again being determined directly by air temperature. Depending on water temperature and shoreline vegetation, temperature contrasts can range from about 4< degrees >C to over 10< degrees >C.
Bibliography of Canadian Geomorphology