GirardinTardifFlanniganEtAl2006

Reference

Girardin, M.P., Tardif, J.C., Flannigan, M.D., Bergeron, Y. (2006) Synoptic-scale atmospheric circulation and boreal Canada summer droughtvariability of the past three centuries. Journal of Climate, 19(10):1922-1947.

Abstract

Five independent multicentury reconstructions of the July CanadianDrought Code and one reconstruction of the mean July-August temperaturewere developed using a network of 120 well-replicated tree-ringchronologies covering the area of the eastern Boreal Plains to theeastern Boreal Shield of Canada. The reconstructions were performedusing 54 time-varying reconstruction submodels that explained upto 50% of the regional drought variance during the period of 1919-84.Spatial correlation fields on the six reconstructions revealed thatthe meridional component of the climate system from central to easternCanada increased since the mid-nineteenth century. The most obviouschange was observed in the decadal scale of variability. Using 500-hPageopotential height and wind composites, this zonal to meridionaltransition was interpreted as a response to an amplification oflong waves flowing over the eastern North Pacific into boreal Canada,from approximately 1851 to 1940. Composites with NOAA Extended ReconstructedSSTs indicated a coupling between the meridional component and tropicaland North Pacific SST for a period covering at least the past 150yr, supporting previous findings of a summertime global ocean-atmospherel-andsurface coupling. This change in the global atmospheric circulationcould be a key element toward understanding the observed temporalchanges in the Canadian boreal forest fire regimes over the past150 yr. © 2006 American Meteorological Society.

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@ARTICLE { GirardinTardifFlanniganEtAl2006,
    AUTHOR = { Girardin, M.P. and Tardif, J.C. and Flannigan, M.D. and Bergeron,Y. },
    TITLE = { Synoptic-scale atmospheric circulation and boreal Canada summer droughtvariability of the past three centuries },
    JOURNAL = { Journal of Climate },
    YEAR = { 2006 },
    VOLUME = { 19 },
    PAGES = { 1922-1947 },
    NUMBER = { 10 },
    ABSTRACT = { Five independent multicentury reconstructions of the July CanadianDrought Code and one reconstruction of the mean July-August temperaturewere developed using a network of 120 well-replicated tree-ringchronologies covering the area of the eastern Boreal Plains to theeastern Boreal Shield of Canada. The reconstructions were performedusing 54 time-varying reconstruction submodels that explained upto 50% of the regional drought variance during the period of 1919-84.Spatial correlation fields on the six reconstructions revealed thatthe meridional component of the climate system from central to easternCanada increased since the mid-nineteenth century. The most obviouschange was observed in the decadal scale of variability. Using 500-hPageopotential height and wind composites, this zonal to meridionaltransition was interpreted as a response to an amplification oflong waves flowing over the eastern North Pacific into boreal Canada,from approximately 1851 to 1940. Composites with NOAA Extended ReconstructedSSTs indicated a coupling between the meridional component and tropicaland North Pacific SST for a period covering at least the past 150yr, supporting previous findings of a summertime global ocean-atmospherel-andsurface coupling. This change in the global atmospheric circulationcould be a key element toward understanding the observed temporalchanges in the Canadian boreal forest fire regimes over the past150 yr. © 2006 American Meteorological Society. },
    KEYWORDS = { Atmospheric movements Atmospheric temperature Correlation methodsDrought Atmospheric circulation Geopotential height Spatial correlationfields Wind composites Climatology atmospheric circulation borealforest climate change drought synoptic meteorology Canada NorthAmerica },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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