Evaluating the major controls on permafrost distribution in Ivvavik National Park based on process-based modelling
Xiping Wang, Yu Zhang, Robert Fraser, Wenjun Chen
In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost ConferenceSession: M2-D
ABSTRACT: The permafrost status at some representative sites in three typical land types (as mountain tops, coastal plains, and river valleys) in Ivvavik National Park was evaluated using a process-based model. The results showed that ground conditions were the most important factor controlling the Active Layer Thickness (ALT). ALT in rocky or gravel ground was deeper (80 - 220 cm), whereas peaty or clay soil made ALT shallower (25 - 50 cm deep) in the park. Active-layer is usually deeper in mountain sites due to the rocky ground conditions. Air temperature is another significant factor affecting both ALT and permafrost thickness. ALT has become significantly deeper since the mid 1980s corresponding to the climate warming.
RÉSUMÉ: L'état du pergélisol de trois sites typiques de type de terrain (comme les sommets, les plaines côtières, et les vallées des rivières) dans le parc national Ivvavik a été évalué sur différents paramètres du sol par un modèle fondé sur les processus. Les résultats ont montrés que la composante sol est le facteur le plus important dans le contrôle de l'épaisseur de La Couche Active (L'ECA). L'ECA dans le sol rocheux ou de gravier a été plus profonde, environs de 80 - 220 cm, que les sols argileux ou tourbeux où l'ECA plus mince est d'environs de 25 - 50 cm dans le parc. La couche active est généralement plus profonde dans les sites montagneux en raison des conditions du sol rocheux. La température est un autre facteur important affectant à la fois l'ECA et l'épaisseur du pergélisol. L'ECA est de plus en plus profonde depuis le milieu des années 1980, ce qui correspond au tendance du réchauffement climatique. 1 INTRODUCTION
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Xiping Wang; Yu Zhang; Robert Fraser; Wenjun Chen (2010) Evaluating the major controls on permafrost distribution in Ivvavik National Park based on process-based modelling in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GEO2010_163,
author = Xiping Wang; Yu Zhang; Robert Fraser; Wenjun Chen,
title = Evaluating the major controls on permafrost distribution in Ivvavik National Park based on process-based modelling ,
year = 2010
}
title = Evaluating the major controls on permafrost distribution in Ivvavik National Park based on process-based modelling ,
year = 2010
}