Long-term thermal evolution and effect of low power heating in an underground quarry |
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Authors: | Catherine Crouzeix Jean-Louis Le Mouël Frédéric Perrier Patrick Richon Pierre Morat |
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Institution: | 1. Laboratoire de géomagnétisme, BP 89, Institut de physique du Globe, 4, place Jussieu, 75252 Paris cedex 05, France;2. Service « Radioanalyse Chimie Environnement », BP 12, Commissariat à l''énergie atomique, 91680 Bruyères-le-Châtel, France |
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Abstract: | Vertical profiles of temperature have been monitored in the atmosphere of an underground quarry since June 2001. A long-term temperature increase of the order of 0.1 °C per year is observed. Three heating experiments with 100-W sources, performed to study plume dynamics, can also be used to investigate the effect of visits on this increase. Ten days after the 24-h heatings, the initial state is not restored. Artificial contributions to the observed long-term temperature trend, triggered by internal heat release, thus cannot be ruled out. This experiment defines strict criteria for the underground monitoring of global warming or the preservation of painted caves. To cite this article: C. Crouzeix et al., C. R. Geoscience 335 (2003). |
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Keywords: | underground cavity long-term thermal evolution low power heating turbulent plumes resilience cavité souterraine évolution thermique à long terme chauffage de faible puissance panaches turbulents résilience |
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