EN FR
GeoConferences.ca

Sensitivity of active-layer development to winter conditions north of treeline, Mackenzie delta area, western Arctic coast

C.R. Burn, Y. Zhang

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: T1-E

ABSTRACT: A simulation of the ground thermal regime in undisturbed tundra near the western Arctic coast has been validated by reproducing changes in ground temperatures between 1970 and 2009 to 53-m depth. The model has been used to determine the response of ground temperatures and active-layer thickness to potential climate warming up to 2100. The majority of the warming is in autumn and winter. Permafrost is sustained under this climate scenario, but a considerable increase in active-layer thickness may occur, because ground cooling is reduced in winter.

RÉSUMÉ: Une simulation du régime thermique du sol, dans une toundra non-remaniée près de la côte de l'arctique de l'ouest, a été validé en reproduisant les changements de températures du sol, jusqu'à profondeur de 53 mètres entre 1970 et 2009. Le modèle utilisé a déterminé la réaction des températures du sol, et l'épaisseur de la couche active, au réchauffement climatique possible jusqu'en 2100. La majeure partie du réchauffement dans le scenario survient en automne et en hiver. Le pergélisol est conservé sous ce climat, mais une augmentation considérable de l'épaisseur de la couche active est possible, parce que le refroidissement du sol pendant l'hiver est réduit. 1 INTRODUCTION

Please include this code when submitting a data update: GEO2010_107

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article:
C.R. Burn; Y. Zhang (2010) Sensitivity of active-layer development to winter conditions north of treeline, Mackenzie delta area, western Arctic coast in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_194, author = C.R. Burn; Y. Zhang,
title = Sensitivity of active-layer development to winter conditions north of treeline, Mackenzie delta area, western Arctic coast,
year = 2010
}