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TitreSurface-coupled three-dimensional geothermal model for study of permafrost geothermal regime in a building environment
AuteurZhou, F; Li, R; Zhang, A; Zhu, L
SourceJournal of Geophysical Research, Atmospheres vol. 113, no. D19, D19102, 2008 p. 1-14, (Accès ouvert)
Séries alt.Ressources naturelles Canada, Contribution externe 20181049
Documentpublication en série
Mediapapier; en ligne; numérique
Formatspdf (Adobe® Reader®); html
Sujetstélédétection; géophysique
ProgrammeGéosciences de changements climatiques, Renforcement de la résilience des communautés canadiennes face aux changements climatiques
Diffusé2008 10 01
Résumé(disponible en anglais seulement)
In many Canadian northern communities the stability of building foundation systems relies on the strength of the underlying permafrost. Building deterioration owing to the loss of this strength or stability would profoundly affect the economies and well-being of the surrounding communities. Although studies of permafrost geothermal regime in natural conditions have been conducted for a long time, studies of ground temperature and its spatial pattern and trend in a building environment are limited. The need for the study is more pressing with the projection of climate warming. Detailed information about the pattern and trend of ground temperature and active layer thickness dynamics under climate warming is essential for examination of potential permafrost degradation, as well as its impacts on buildings that are built on/in it. To quantify geothermal responses, and then permafrost degradation, to climatic change in different locations underneath a building, a surface-coupled three-dimensional geothermal model was developed. The model is physical process-based and couples heat and water processes at ground surface and subsurface with simulation of incoming solar radiation and precipitation distributions surrounding and underneath a building by accounting for the effect of the building's dimensions and orientation on the energy and water balance processes at the ground surface. This paper describes the theoretical basis upon which the model is built, the specific factors, and processes considered to represent the permafrost environment surrounding and below buildings, as well as the testing of the model with two different data sets and a theoretical model.