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A permafrost probability model for the Southern Yukon and Northern British Columbia, Canada

Auteur(s) et Affiliation(s)

BONNAVENTURE, P.P.
Dep. of Geography, Univ., Ottawa, Canada
Dep. of Geography, Queen's Univ., Ontario, Kingston, Canada
LEWKOWICZ, A.G.
Dep. of Geography, Univ., Ottawa, Canada
KREMER, M.
Dep. of Geography, Univ., Ottawa, Canada
SAWADA, M.C.
Dep. of Geography, Univ., Ottawa, Canada


Description :
The high-resolution probability model for the southern Yukon and northern British Columbia presented here (regional model) is a combination of 7 local empirical-statistical models, each developed from basal temperature of snow measurements in winter and ground-truthing of frozen-ground presence in summer. The models were blended using a distance-decay power approach to generate a map of permafrost probability over an area of almost 500 000 km2 between 59°N and 65°N. The result is broadly similar to previous permafrost maps. There are notable differences in detail, however, because the main predictive variable used in the local models is equivalent elevation, which incorporates the effects of gentle or inverted surface lapse rates in the forest zone. The results of the modelling can be presented on paper using traditional classifications into permafrost zones but given the level of detail, they will be more useful as an interactive online map.


Type de document :
Article de périodique

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2012, vol. 23, n°. 1, p. 52-68, nombre de pages : 17, Références bibliographiques : 48 ref.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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