New reconstructions of streamflow variability in the South Saskatchewan River Basin from a network of tree ring chronologies, Alberta, Canada

Axelson, Jodi N., Sauchyn, David J. and Barichivich, Jonathan (2009) New reconstructions of streamflow variability in the South Saskatchewan River Basin from a network of tree ring chronologies, Alberta, Canada. Water Resources Research, 45 (9). ISSN 1944-7973

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Abstract

In western Canada growing demand for water resources has increased vulnerability to hydrological drought. The near full allocation of water supplies in the Oldman and Bow River subbasins of the South Saskatchewan River Basin has resulted in a moratorium on new surface water licenses. In this region, short instrumental records limit the detection of long-term hydrological variability. To extend the historical record, we collected 14 new moisture-sensitive tree ring chronologies and reconstructed the average October through September flow of the Oldman (1618-2004) and South Saskatchewan (SSR) (1400-2004) rivers. Our SSR proxy record updates a previously published reconstruction. While the 20th century is representative of drought frequency over the long term, droughts are of greater severity and duration in the preinstrumental proxy record. A spectral analysis of the reconstructed flows revealed quasiperiodic cycles at interannual to multidecadal scales. Copyright 2009 by the American Geophysical Union.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Environmental Sciences
Depositing User:	Rachel Snow
Date Deposited:	23 Feb 2011 11:07
Last Modified:	05 Jan 2023 17:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/24565
DOI:	10.1029/2008WR007639

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