Evidence for a climate-driven hydrologic regime shift in the Canadian Columbia Basin
Author: J. Brahney, F. Weber, V. Foord, J. Janmaat, P.J. Curtis
This work examines the historical changes and regional variability in the relationships between climate indicators and streamflow in the Columbia Basin of Canada. We further evaluate changes in the seasonal timing and annual runoff volume across the diverse landscape of the basin.
Available streamflow and climate data records for the Canadian portion of the Columbia Basin indicate that annual streamflows have decreased since 1980. In addition, the statistical relationships between Pacific climate indices (PDO/ENSO) and streamflow showed significant changes pre- and post-1980. Statistically significant inverse relationships between streamflow and the cumulative numbers of warm days were also found. These observations are suggestive of a regime shift in the drivers of streamflow in the Canadian Columbia Basin. The nature of these changes is likely related to recent climate
change; however, the particular mechanisms responsible, including changes to storm trajectories, evapotranspiration or snowpack conditions above the treeline, remain unclear.
Available streamflow and climate data records for the Canadian portion of the Columbia Basin indicate that annual streamflows have decreased since 1980. In addition, the statistical relationships between Pacific climate indices (PDO/ENSO) and streamflow showed significant changes pre- and post-1980. Statistically significant inverse relationships between streamflow and the cumulative numbers of warm days were also found. These observations are suggestive of a regime shift in the drivers of streamflow in the Canadian Columbia Basin. The nature of these changes is likely related to recent climate
change; however, the particular mechanisms responsible, including changes to storm trajectories, evapotranspiration or snowpack conditions above the treeline, remain unclear.
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Additional Info
Study Years: 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Published: 2017
Evidence for a climate-driven hydrologic regime shift in the Canadian Columbia Basin
Author: J. Brahney, F. Weber, V. Foord, J. Janmaat, P.J. Curtis
This work examines the historical changes and regional variability in the relationships between climate indicators and streamflow in the Columbia Basin of Canada. We further
evaluate changes in the seasonal timing and annual runoff volume across the diverse landscape of the basin.
Summary
Available streamflow and climate data records for the Canadian portion of the Columbia Basin indicate that annual streamflows have decreased since 1980. In addition, the statistical relationships between Pacific climate indices (PDO/ENSO) and streamflow showed significant changes pre- and post-1980. Statistically significant inverse relationships between streamflow and the cumulative numbers of warm days were also found. These observations are suggestive of a regime shift in the drivers of streamflow in the Canadian Columbia Basin. The nature of these changes is likely related to recent climate
change; however, the particular mechanisms responsible, including changes to storm trajectories, evapotranspiration or snowpack conditions above the treeline, remain unclear.
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Study Years: 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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Published: 2017Study Years: 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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