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13-17 May 2013
Tucson, Arizona
US/Arizona timezone
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Investigation and reconstructions of the hydroclimatic variability of the Souris River Basin, Saskatchewan, Manitoba, and North Dakota

Presented by Jessica VANSTONE on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Board #: 52

Content

Fourteen moisture sensitive tree-ring sites, (37 chronologies; annual, earlywood, and latewood) were developed to create robust multi-proxy reconstructions of annual water year and summer streamflow for four gauges within the Souris River Basin. Multiple linear regressions were able to account for ~76% and ~67% of the instrumental variance for water-year and summer flows, respectively. Spectral analyses provide evidence that streamflow variability in the Souris River Basin is driven by a combination of interannual, interdecadal, and multidecadal ocean-atmosphere oscillations. Correlation analyses, cross-wavelet transforms and wavelet transform coherence identify significant periods of high common power and coherence of streamflow with ENSO, solar sunspot cycles, and PDO indices. When these sea-surface temperatures and atmospheric oscillations are coupled, and in-phase with each other, it may lead to more prolonged and possibly greater in magnitude extremes than when climate anomalies are out of phase, resulting in a relatively modest influence of streamflow variability.

Place

Location: DoubleTree
Room: Salon E

Primary authors

  • Jessica VANSTONE Prairie Adaptation Research Collaborative, University of Regina
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Co-authors

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