Spatial variation in the thermal regime of Mackenzie Delta lakes and channels

T.P. Ensom, C.R. Burn, S.V. Kokelj

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

Session: T2-E

ABSTRACT: The Mackenzie Delta, Northwest Territories, is an alluvial plain with approximately 40% aerial coverage of lakes and distributary channels. Tundra and taiga ecozones create two distinct terrestrial permafrost environments within the delta. Continuous temperature measurements made in 27 delta water bodies during 2009 indicate little spatial variation in the summer thermal regime of channels and lakes. Low spatial variation is also expected on an annual basis.

RÉSUMÉ: Le Delta du Mackenzie, dans les Territoires du Nord-Ouest, est un plan alluvial couvert à 40 pour cent par des lacs et des chenaux. Les regions de toundra et taïga créent deux environments distinctifs de pergélisol terrestre dans le delta. Des mesures continues de temperature dans 27 nappes d'eau du delta, prisent en 2009, indiquent qu'il n'y a pas beaucoup de variation spatiale pendant l'été dans le régime thermal des chenaux et lacs du delta. Une faible variation spatiale est aussi prévue sur une base annuelle.

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