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I work in the areas of paleohydrology, aqueous geochemistry and lacustrine sedimentology. Many of my specific research interests involve geochemical exchange between surface water and groundwater, and the representation of these exchanges in lacustrine sedimentary records. I'm engaged both in trying to understand the basic processes controlling lake geochemical response to environmental change, and in using that understanding to reveal hydroclimatic and environmental history. I have particular interests in how climate variability affects aquatic systems in semi-arid landscapes, especially the North American interior. I came to paleoenvironmental research from a background in management hydrogeology, and I am actively interested in incorporating paleorecord information into water management and conservation thinking. The research I do is multifaceted but reflects two major themes:
- characterization and modeling of modern lake processes based on aqueous geochemistry of lakes, groundwater and precipitation, and
- analysis of the style and timing of Holocene environmental change through geochemistry of sediment cores, interpreted in the context of modern lake/aquifer processes.
My investigation of these themes employs analysis of mineral solubility and mass balance, modeling evolution of stable isotopes in lakes, sedimentology and spectral analyses of lacustrine sediments, and studies of lake carbon cycling. For more specifics about the direction of my research, check out some publications.
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