AmeriDendro 2013 registration is open: follow the link on the Overview page.
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
Session: Poster Session + Reception
Board #: 52
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.