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(Article of periodic en Anglais - 2010)

Document title

Climatic and geomorphic factors affecting contemporary (1950-2004) activity of retrogressive thaw slumps on the Aklavik Plateau, Richardson Mountains, NWT, Canada

Authors(s) and Affiliation(s)

LACELLE D. (1) ; BJORNSON J. (2) ; LAURIOL B. (2) ;
(1) Planetary Exploration and Space Astronomy, Canadian Space Agency, St-Hubert, CANADA
(2) Dep. of Geography, Univ., Ottawa, CANADA

Abstract

The climatic and geomorphic factors affecting retrogressive thaw slump initiation and activity on the Aklavik Plateau (Richardson Mountains, NWT) were examined using historical air photographs over a 54-year period (1950-2004). All thaw slumps on the Aklavik Plateau are located within the glacial limit of the Laurentide Ice Sheet and the majority developed on the western side of the valley on gently sloping terrain. Aerial photographic analysis showed an increase in thaw slump initiation over the 1954-71 period and over the 1985-2004 period. However, the total number of active mature thaw slumps on the Aklavik Plateau decreased from a maximum of 46 in 1950 to a minimum of 24 observed in 2004. Both these trends may relate to the influence of climate on the erosional processes that are thought to initiate thaw slumps and keep them active in regions of highlands

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2010, vol. 21, no1 [pp. 1-15]

Bibliographic references : 1,5 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.666

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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