Variabilité et fréquence des cycles de gel-dégel dans la région de Québec, 1977–2006

作者: Guillaume Fortin , None

DOI: 10.1111/J.1541-0064.2009.00291.X

关键词:

摘要: Les cycles de gel-degel surviennent generalement au debut et a la fin saison hivernale. impacts ces sur les ecosystemes sont nombreux ils affectent notamment differentes composantes biotiques abiotiques des environnements temperes froids l'est du Canada. En nous basant donnees temperatures (minima maxima) provenant quatre stations meteorologiques region Quebec, avons determine frequence journaliers pour une periode pres trente ans. resultats indiquent que n'a pas connu augmentation marquee cours trois dernieres decennies, malgre legere le secteur d'etude. Des equations polynomiales reliant moyennes avec nombre ont ete calculees. ainsi un scenario climatique prevoyant l'ordre 5 °C d'ici 2100, estime jours comptant pourrait augmenter jusqu'a 20 par hiver. L'augmentation se produira principalement durant mois plus (janvier fevrier). Variability and frequency of the freeze thaw in Quebec region, 1977–2006. Freeze-thaw are most common at beginning or near end winter season. These have various effects on ecosystems Eastern Canada, affecting both biotic abiotic components temperate cold environments. Using air temperature minima maxima from four meteorological close to City, we determined daily freeze-thaw for last 30 years. The results show no significant increase number despite small temperature. Polynomial curves describing relationship between mean were calculated. Based these anticipating climate change scenario, projected future cycles. Assuming by estimated that days with cycle could approximately per winter. such will be concentrated during coldest months (January February).

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