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Energethique » 2011 » février

Le pergélisol : une autre arme braquée sur notre tempe

Le pergélisol désigne un sous-sol gelé en permanence. Il représente environ 20% de la surface mondiale, 25 millions de km², dont un quart des terres de l’hémisphère Nord. Mais suite aux températures en hausse, le pergélisol fond lentement mais sûrement. Au Québec, il a déjà reculé de 130 km vers le Nord.

« Selon nos calculs, le dégel a débuté il y a une quinzaine d’années » explique Kevin Schaefer, chercheur au sein du Central National américain sur les Données de la Neige […]