Dr. Ted Lewis
Post-Doctoral Fellow
Office: Mackintosh-Corry Hall, Room E105
Phone: +001 (613) 533-6000 ext. 78058
Fax: +001 (613) 533-6122
Email: Ted.Lewis@queensu.ca
 Biography and Research Interests
Publications
Biography and Research Interests
I grew up in Nepean, ON, and went to Queen’s for my BSc (geography/geology) and MSC (geography), then University of Massachusetts at Amherst for my PhD. I was fascinated by undergraduate classes in limnology, arctic environments, and sedimentology. This led to a MSc project at Bear Lake, Devon Island investigating lacustrine sedimentary processes in a glacially fed lake [1, 2]. I continued my research of arctic lake processes in my PhD at Lake Tuborg, Ellesmere Island. Lake Tuborg is a large glacially-fed lake that contains trapped saltwater, leading to a number of fascinating hydrologic and lacustrine processes. In particular, I monitored a large glacial lake outburst flood, measured the effect it had on lake processes and sedimentation, then used long sediment cores to identify the occurrence of similar past events over the last thousand years [3, 4].
Other research during my PhD involved studying lacustrine and hydrologic processes at South Sawtooth Lake, Ellesmere Island [5, 6]. I have also used and improved techniques of micro-scale determination of sedimentary texture and structure using image analysis [7]. Image analysis is extremely useful for very small-scale analyses of sediments, for example for determination of subannual processes recorded in annually-laminated sediments.
As a post-doctoral fellow, I have continued to study arctic lakes, particularly the role of near-bottom lake currents, and their influences on physical and biological conditions [8]. Studying arctic lakes has naturally led to hydrologic research, since rivers carry sediments, nutrients, and pollutants into lakes. In particular, I am curious about fluxes of water, sediment, and biogeochemical components, and how these respond to changes in weather and climate [6, 9]. Part of this work has involved using computer models to predict changes in arctic hydrology in the 21st century [10]. I am particularly interested in how warmer temperatures will affect permafrost in arctic catchments, and how biogeochemical fluxes will be affected. This is the subject of ongoing research.
Publications
1. Lewis, T., R. Gilbert, and S.F. Lamoureux, Spatial and temporal changes in sedimentary processes at proglacial Bear Lake, Devon Island, Nunavut. Arctic, Antarctic, and Alpine Research, 2002. 34: p. 119-129.
2. Lamoureux, S.F., R. Gilbert, and T. Lewis, Lacustrine sedimentary environments in High Arctic proglacial Bear Lake, Devon Island, Nunavut. Arctic, Antarctic, and Alpine Research, 2002. 34: p. 130-141.
3. Lewis, T., P. Francus, and R.S. Bradley, Recent occurrence of large jökulhlaups at Lake Tuborg, Ellesmere Island, Nunavut. Journal of Paleolimnology, 2008. DOI 10.1007/s10933-008-9240-4.
4. Lewis, T., P. Francus, and R.S. Bradley, Limnology, sedimentology, and hydrology of a jökulhlaup into a meromictic high arctic lake. Canadian Journal of Earth Sciences, 2007. 44: p. 791-806.
5. Francus, P., et al., Limnological and sedimentary processes at Sawtooth Lake, Canadian High Arctic, and their influence on varve formation. Journal of Paleolimnology, 2008. DOI 10.1007/s10933-008-9210-x.
6. Lewis, T., et al., An extreme sediment transfer event in a Canadian High Arctic stream. Arctic, Antarctic, and Alpine Research, 2005. 37: p. 477-482.
7. Lewis, T., et al., An automated system for the statistical analysis of sediment texture and structure at the micro scale. Computers and Geosciences, accepted 2010.
8. Lewis, T., S.F. Lamoureux, and H. Dugan, River influence on high conductivity bottom water and near bottom flows in a High Arctic lake. Limnology and Oceanography, submitted 2010.
9. Dugan, H., et al., Major hydrological and sediment yield response to summer rainfall in a small high arctic watershed. Hydrological Processes, 2009. DOI: 10.1002/hyp.7285.
10. Lewis, T. and S.F. Lamoureux, Twenty-first century discharge and sediment yield predictions in a small High Arctic watershed. Global and Planetary Change, 2010. DOI: 10.1016/j.gloplacha.2009.12.006.
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