Recent Variations in Climate and Hydrology in Canada
- 1 January 2000
- journal article
- Published by Taylor & Francis in Canadian Water Resources Journal / Revue canadienne des ressources hydriques
- Vol. 25 (1) , 19-65
- https://doi.org/10.4296/cwrj2501019
Abstract
Climatic and hydrologic variations between the decades 1976–1985 and 1986–95 are examined at 210 climate stations for temperature, 271 climate stations for precipitation, and 642 hydrology stations from across Canada. The variations in climate are distributed across a broad spatial area. Temperatures were generally warmer in the more recent decade, with many stations showing significant increases during spring and fall. Significant decreases in temperature were found during winter in eastern Canada. Significant increases in temperature were more frequent in western Canada than in the east. Significant decreases in precipitation were also more prevalent in the north, as were increases in the south, except for Ontario and Quebec where little or no change has taken place. The hydrologic responses to these variations in climate are classified into four hydrograph types and six patterns of shifts in streamfiow between the two decades. The 642 hydrologic stations fall into 16 of the potential 24 groups. These 1... Les variations climatiques et hydrologiques entre les décennies allant de 1976 à 1985 et de 1986 à 1995 sont analysées à 210 stations de climatologie pour la température, à 271 stations de climatologie pour les précipitations ainsi qu’à 642 stations d’hydrologie de partout au Canada. Les variations climatiques sont distribuées dans une vaste zone spatiale. Les températures étaient en général plus élevées au cours des décennies récentes, de nombreuses stations présentant des hausses considérables au printemps et à l’automne. Des baisses de température importantes ont été constatées au cours de l’hiver dans l’Est du Canada. Les hausses de température importantes s’avéraient plus fréquentes dans l’Ouest du Canada que dans l’Est. Des baisses considérables des précipitations étaient également plus courantes dans le Nord, tout comme l’étaient les hausses dans le Sud, sauf en Ontario et au Québec, où l’on a enregistré que peu de changements ou pas du tout. Les réactions hydrologiques à ces variations climatiques...This publication has 9 references indexed in Scilit:
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