Progress in isotope paleohydrology using lake sediment cellulose
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Recent advances in sample preparation techniques and mass spectrometry have fostered more routine oxygen isotope analysis of aquatic cellulose in lake sediment cores, a proxy for lake water oxygen isotope history. These methodological developments have significantly increased the feasibility of incorporating this approach into high-resolution, multi-site, and multi-proxy studies, which are frequently necessary to answer complex hydrological, hydroecological and hydroclimatic questions requiring a paleoenvironmental perspective. Direct translation of lake sediment aquatic cellulose oxygen isotope composition into lake water oxygen isotope composition offers appreciable opportunity for quantitative paleohydrological reconstructions, as evidenced by studies conducted over the past 15 years that span Holocene and pre-historical timescales.
KeywordsCellulose Oxygen isotope composition Lake sediments Paleohydrology Heavy liquid density-separation CF-IRMS
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We would like to extend our thanks to funding agencies which have supported our isotope paleohydrology research over the past two decades. These primarily include the Natural Sciences and Engineering Research Council of Canada, the US National Science Foundation, and the Canada Foundation for Innovation and Ontario Innovation Trust, as well as BC Hydro, our industrial partner in ongoing paleoenvironmental studies of the Peace-Athabasca Delta. We are also especially grateful for the superb technical support provided by the staff of the University of Waterloo—Environmental Isotope Laboratory. Comments from two anonymous reviewers helped to improve the manuscript.
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