Modes de variabilité temporelle des débits moyens annuels et leurs liens avec les indices climatiques au québec (canada)

Assani, Ali A.; Lajoie, Francis; Vadnais, Marie-Ève; Benseghir, Safia; Bureau, Caroline

doi:10.7202/017996ar

Cited by 4 publications

(4 citation statements)

References 55 publications

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“…Seven climate indices were chosen that have been shown to affect the interannual variability of hydro‐climatic variables in North America in general and in Canada in particular (e.g. Enfield et al , ; Anctil and Coulibaly, ; McCabe et al , ; Coulibaly and Burn ; Déry and Wood , ; Assani et al , , , ; Kingston et al , , ). These are: AMO (Atlantic Multidecadal Oscillation), AO, Arctic Oscillation, NAO (North Atlantic Oscillation), PNA, Pacific/North American index, NINO3.4 [East Central Tropical Pacific Sea Surface Temperature (5°N‐5°S) (170°‐120°W)], PDO (Pacific Decadal Oscillation) and SOI (Southern Oscillation Index).…”

Section: Methodsmentioning

confidence: 99%

Comparison of Interannual Variability Modes and Trends of Seasonal Precipitation and Streamflow in Southern Quebec (Canada)

Assani

Landry

Laurencelle

2011

River Research & Apps

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The interactions between precipitation, streamflow and groundwater are very complex. In cold temperate regions characterized by harsh winters, winter streamflow is mainly derived from aquifers that are recharged in the spring, during snowmelt, and in the fall, when evapotranspiration is subdued. Despite this complexity, the modes and trends in the interannual variability of spring (April, May, June and July) streamflow and fall (August, September, October and November) precipitation and streamflow were compared to the modes and trends in the interannual variability of winter (December, January, February and March) streamflow in southern Quebec from 1950 to 2000. Results indicate that the variability modes are identical for all four of these hydro‐climatic variables: two modes (south‐east and east modes) on the south shore of the St. Lawrence River on either side of the 47°N and a single mode (south‐west mode) on the north shore. As for the trend, a significant increase in winter streamflow was observed on the north shore. This increase is comparable to that observed in spring streamflow, which suggests that winter streamflow on the north shore is mainly derived from groundwater recharge during the spring. Moreover, both spring and winter streamflows are positively correlated to the North Atlantic Oscillation climate index. On the south shore, south of the 47°N, a significant decrease was observed in the trend of the interannual variability of winter streamflow, this in spite of a significant increase in fall precipitation and streamflow. An increase in evaporation (decreased infiltration) due to a shift from forest cover to agricultural land cover in this region could account for this. However, fall precipitation and streamflow and winter streamflow are significantly correlated to the Atlantic Multidecadal Oscillation winter index. This correlation is negative with the first two variables but positive with the third. This study suggests that, in southern Quebec, the interannual variability of winter streamflow is mainly affected by spring recharge in non‐agricultural catchments (east and south‐west modes) and by farming in agricultural catchments (south‐east mode). Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

Comparison of Interannual Variability Modes and Trends of Seasonal Precipitation and Streamflow in Southern Quebec (Canada)

Assani

Landry

Laurencelle

2011

River Research & Apps

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“…The climate indices selected are those which have been shown to affect the interannual and interdecadal variability of streamflow in North America in general, and in Quebec in particular (e.g. Anctil and Coulibaly 2004;Assani et al 2006cAssani et al , 2008Assani et al , 2010aBurn 2004, 2005;Wood 2004, 2005;McCabe et al 2004). They are the following: the Arctic Oscillation (AO), the Atlantic Multidecadal Oscillation (AMO), the North Atlantic Oscillation (NAO), the Decadal Pacific Oscillation (DPO), the Southern Oscillation Index (SOI) and the NINO3.4 phenomenon (Table 2).…”

Section: Choice Of Rivers and Climate Indicesmentioning

confidence: 99%

Temporal Regionalization of 7-Day Low Flows in the St. Lawrence Watershed in Quebec (Canada)

Assani

Chalifour

Légaré

et al. 2011

Water Resour Manage

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Winter and summer 7-day low flows of eighteen natural rivers in the St. Lawrence River watershed of Quebec were analyzed over the period from 1934 to 2000. The rivers were first subdivided into three modes using principal component analysis. Two of these modes are located on the south shore of the St. Lawrence River, respectively south (Southeast mode) and north (East mode) of the 47°N, and the third (Southwest mode) is located on the north shore. The Southeast mode shows a significant increase in 7-day low flows in winter and summer due to increasing summer and fall precipitation, whereas the Southwest mode shows a significant decrease in summer 7-day low flows due to an increase in evapotranspiration. No significant change in winter and summer 7-day low flows is observed in the East mode. Results show that the variability of 7-day low flows and their link with climate indices are mainly seasonally dependent. The North Atlantic Oscillation (NAO) is the only index which is correlated to 7-day low flows in all three modes. This correlation is positive for north shore rivers and negative for south shore rivers. Furthermore, only north shore rivers are correlated to NAO in both winter and summer.

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“…These climatic conditions can also be influenced by atmospheric patterns such as NAO, AO, SO, PNA and AMO. Similarly, Assani et al () assessed the influence of four of these patterns (all except for the AMO) for 70 hydrologic stations in southern Quebec between 1970 and 1995. These results not only showed how the atmospheric patterns influenced precipitation fluctuations, but also emphasized that different river flow phases had even greater influence.…”

Section: Introductionmentioning

confidence: 99%

Estimating winter trends in climatic variables in the Chic-Chocs Mountains, Canada (1970-2009)

Fortin

Hétu

2013

Int. J. Climatol.

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This paper presents an analysis of winter climate variability based on daily mean temperature and precipitation data since 1970 in the Chic-Chocs Mountain range (located in the Gaspé Peninsula, Eastern Quebec, Canada). Mountain environments are particularly sensitive to rapid climate change and are therefore good indicators of recent global warming. The main goal of this study is to demonstrate how joint probability temperature/precipitation distributions can be used to estimate winter condition changes (trends) for six meteorological stations in the study area (the altitudinal range for the stations is from 5 to 574 m). The presence and persistence of snow cover was also estimated. Previous studies have shown a lack of evidence of significant trends in snow-cover characteristics (density, depth and snow water equivalent (SWE)) from the early 1980s to the present, despite an increase in temperature over the same period. A reanalysis of these data sets in addition to the use of a combination of temperature and precipitation data categorized into four modes (warm/wet, warm/dry, cold/wet and cold/dry) was also performed. Despite this new analysis, no clear evidence of climate change could be found in the study area over the last four decades. The results revealed that patterns and trends are quite different from one station to another, but when the environment is taken into account (valley or plateau, coastal versus inland) some apparent patterns emerge.

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Modes de variabilité temporelle des débits moyens annuels et leurs liens avec les indices climatiques au québec (canada)

Cited by 4 publications

References 55 publications

Comparison of Interannual Variability Modes and Trends of Seasonal Precipitation and Streamflow in Southern Quebec (Canada)

Comparison of Interannual Variability Modes and Trends of Seasonal Precipitation and Streamflow in Southern Quebec (Canada)

Temporal Regionalization of 7-Day Low Flows in the St. Lawrence Watershed in Quebec (Canada)

Estimating winter trends in climatic variables in the Chic-Chocs Mountains, Canada (1970-2009)

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