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Ground temperature variation with snow, Kendall Island Bird Sanctuary, outer Mackenzie Delta, Northwest Territories

P.D. Morse, C.R. Burn, S.V. Kokelj

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

Session: T1-E

ABSTRACT: Near-surface ground temperatures in the Kendall Island Bird Sanctuary (KIBS), investigated from 2005 to 2009, were principally influenced by snow depth. The snow pack evolves primarily by wind redistribution and follows the same spatial pattern annually. Snow depth was dominantly influenced by topography in uplands and vegetation height in the alluvial plain. Ground temperatures and active-layer thicknesses, and their ranges, were greater at the alluvial plain than at the upland. Considerable snow during active-layer freezing significantly prolonged the zero curtain.

RÉSUMÉ: Les températures du sol au Kendall Island Bird Sanctuary (KIBS), étudiées entre 2005 et 2009, étaient principalement influencées par la profondeur de la neige. L'épaisseur de la couche nivale résulte principalement de la redistribution aéolienne et celle-ci suit le même modèle annuellement. Dans les hautes terres la profondeur de la neige était influencée par la topographie tandis que dans la plaine alluviale elle était controllée par la hauteur de la vegetation. La température moyenne du sol était plus élevées dans la plaine alluviale que dans les hautes terres du à l'épaisseur accrue du couvert nival et de la couche active. Le développement d'un couvert nival considérable au moment du regel a nettement prolongé la durée de la période zero.

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Cite this article:
P.D. Morse; C.R. Burn; S.V. Kokelj (2010) Ground temperature variation with snow, Kendall Island Bird Sanctuary, outer Mackenzie Delta, Northwest Territories in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_192, author = P.D. Morse; C.R. Burn; S.V. Kokelj,
title = Ground temperature variation with snow, Kendall Island Bird Sanctuary, outer Mackenzie Delta, Northwest Territories,
year = 2010
}