PrevostBarrySteinEtAl1991

Référence

Prevost, M., Barry, R., Stein, J. and Plamondon, A.P. (1991) Snowmelt modeling in a balsam fir forest - comparison between an energy-balance model and other simplified models. Canadian Journal of Forest Research, 21(1):1-10.

Résumé

This study compares snowmelt models and determines the relative importance of the meterological parameters affecting snowmelt during the 1985, 1986, and 1987 melt seasons in a dense balsam fir stand in Laurentide forest, 80 km north of the city of Quebec. Net all-wave radiation, air temperature, wind speed, relative humidity, and rainfall were correlated with meltwater that reached the base of the snow cover as measured with a 20-m2 snow lysimeter. The estimation of energy balance components of the snow cover during the snowmelt period showed that while solar radiation absorption dominated, turbulent transfers as well as heat exchanges with ground and rain were negligible. The temperature index model SNOW-17 yielded predictions of snow cover outflow as accurately as the energy balance model, both explaining 64% of hourly outflow variation and more than 85% of daily outflow variation. Single meterological parameters usually explained less than 25% of the hourly melt because of the meltwater transmission lag through the snowpack. On a daily basis, the relationships using air temperature or net all-wave radiation as sole index both explained nearly 70% of snowmelt outflow for the same period. Combining these two parameters with rainfall in the same equation increased the explained variance to 85%.

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@ARTICLE { PrevostBarrySteinEtAl1991,
    AUTHOR = { Prevost, M. and Barry, R. and Stein, J. and Plamondon, A.P. },
    TITLE = { Snowmelt modeling in a balsam fir forest - comparison between an energy-balance model and other simplified models },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 1991 },
    VOLUME = { 21 },
    PAGES = { 1-10 },
    NUMBER = { 1 },
    ABSTRACT = { This study compares snowmelt models and determines the relative importance of the meterological parameters affecting snowmelt during the 1985, 1986, and 1987 melt seasons in a dense balsam fir stand in Laurentide forest, 80 km north of the city of Quebec. Net all-wave radiation, air temperature, wind speed, relative humidity, and rainfall were correlated with meltwater that reached the base of the snow cover as measured with a 20-m2 snow lysimeter. The estimation of energy balance components of the snow cover during the snowmelt period showed that while solar radiation absorption dominated, turbulent transfers as well as heat exchanges with ground and rain were negligible. The temperature index model SNOW-17 yielded predictions of snow cover outflow as accurately as the energy balance model, both explaining 64% of hourly outflow variation and more than 85% of daily outflow variation. Single meterological parameters usually explained less than 25% of the hourly melt because of the meltwater transmission lag through the snowpack. On a daily basis, the relationships using air temperature or net all-wave radiation as sole index both explained nearly 70% of snowmelt outflow for the same period. Combining these two parameters with rainfall in the same equation increased the explained variance to 85%. },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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