(Article of periodic en Anglais - 2012)

Document title

Spatial and thermal characteristics of mountain permafrost, Northwest Canada

published at : The mountain cryospere - a holistic view on processes and their interactions

Authors(s) and Affiliation(s)

LEWKOWICZ A.G. (1) ; BONNAVENTURE P.P. (1 2) ; SMITH S.L. (3) ; KUNTZ Z. (1) ;
(1) Dep. of Geography, Univ., Ottawa, CANADA
(2) Dep. of Geography, Queen's Univ., Ontario, Kingston, CANADA
(3) Geological Survey of Canada, Natural resources, Ottawa, CANADA


An extensive network of monitoring stations was used to develop a mean annual air temperature map for the complex mountainous terrain in the southern Yukon and northern British Columbia. Relationships between air and ground surface temperatures, expressed as freezing and thawing n-factors, vary significantly with vegetation type and hence elevational band, with the lowest values for the forested zone and the highest for non-maritime alpine tundra. Equilibrium modelling carried out for one site in the southern part of the region and one in the northern part illustrates the impacts of the differing n-factors on trends in mean ground surface temperature with elevation. Given the range of air temperatures and n-factors, permafrost is possible throughout the Yukon but higher temperatures southward and stronger lapse rates mean that a lower elevational limit exists in northern British Columbia


Thematical fascicle

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2012, vol. 94, no 2 [pp. 195-213]

Bibliographic references : 48 ref.

Collation : fig., tabl.




Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2012.00462.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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