CGRG Bibliography of Canadian Geomorphology
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Author : Buhay, W.M.; Babb, J.; Bailey, D.; and Hemminger, L.
Date : 2005.
Title : A 1000-year reconstruction of southern Manitoba droughts.
Publication : Water, Ice, Land, And Life: The Quaternary Interface. Canadian Quaternary Association 2005 Conference June 5-8, 2005, University of Manitoba, Winnipeg, Manitoba.
Issue : Abstract Volume:
Page(s) : A10.
Abstract
The way in which organic sediments deposited in lakes accumulate carbon and oxygen is isotopically sensitive to the atmospherically influenced lake environment present at the time of sediment deposition. Consequently, they represent a valuable, unique, and well-calibrated source of past drought/dry period information. In 1999 a 1.56-metre gravity sediment core (core S8) was obtained from the South Basin of Lake Winnipeg (determined to represent the period 950 to 1999 AD) and subsequently divided into one cm intervals (156 in total). After processing, bulk organic carbon isotopic compositions and cellulose oxygen isotopic compositions for the 156 sediment samples were determined using a continuous flow isotope ratio mass spectrometer (University of Winnipeg Isotope Laboratory; UWIL). The reconstructed record of droughts matches recorded and historical occurrences of droughts and prolonged dry periods in the Red and Assiniboine River Basins remarkably well. This presentation will quantify the chronology, severity and duration of droughts impacting southern Manitoba over the past 1000 years.
Bibliography of Canadian Geomorphology