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James Kaste

Assistant Professor

Office: McGlothlin-Street Hall 217
Email: [[jmkaste]]
Office Phone: 757 221 2951

Education

Ph.D. in Earth Sciences, Dartmouth College
M.S. in Geological Sciences, University of Maine
B.A. in Geological Sciences, SUNY Geneseo

Research Interests

Environmental Geochemistry, Isotope Geochemistry & Sediment transport

The goal of my research is to describe chemical and physical processes operating near the earth’s surface, with a focus on quantifying sediment transport, chemical weathering, and the fate of carbon and contaminants in the environment. My aim is to understand how processes at the earth’s surface are affected or disrupted by anthropogenic activities (groundwater withdrawal, acid and metal pollution, urban development) and global change. I develop and apply a number of lab and field-based approaches to quantify surface processes operating on timescales from months to millennia, including i) watershed solid and solute budgets, ii) lithogenic, artificial, and cosmogenic radionuclide tracers, and iii) quantitative characterization of soil mineralogy and soil profile development.

Current Projects

The fate of gasoline-derived Pb in forested watersheds

Using short-lived fallout radionuclides to date sediments and surfaces

The effects of Dams on sediment transport and habitats in rivers

Connecting groundwater decline to soil erosion in Owens Valley, CA

Chemical weathering of silicate minerals and the evolution of Spodosol Profiles

The natural trapping of Uranium by wetlands

Selected Publications

Elmore AJ, Kaste JM, Okin GS, Fantle MS (2008) Groundwater influences on atmospheric dust generation in deserts. Journal of Arid Environments , vol. 72, pp.1753– 1765

Schroth AW, Bostick BC, Kaste JM, Friedland AJ (2008) Lead sequestration and species redistribution during soil organic matter decomposition. Environmental Science & Technology, vol. 42, pp. 3627-3633.

Kaste JM, Heimsath AM, and BC Bostick (2007), Tracing short-term soil mixing with fallout radionuclides. Geology, vol. 35, pp. 243-246.

Kaste JM, Bostick BC, Friedland AJ, Schroth AW, and TG Siccama (2006) Fate and speciation of gasoline-derived lead in organic horizons of the Northeastern USA. Soil Science Society of America Journal, vol. 70, pp.1688-1698.

Kaste JM, Bostick BC, Heimsath, AM (2006) Determining 234Th and 238U in rocks, soils, and sediments via the doublet gamma at 93 keV. The Analyst, vol. 131, pp. 757-763.

Kaste JM, Heimsath AM, and Hohmann MG (2006) Quantifying sediment transport across an undisturbed prairie landscape using 137Cs and high resolution topography. Geomorphology, vol. 76, pp. 430-440.

Kaste JM, Friedland AJ, and Miller EK (2005) Potentially mobile lead fractions in montane organic-rich soil horizons. Water, Air, and Soil Pollution, vol.167, pp. 139-154.

Kaste JM, Friedland AJ, and Sturup S (2003) Using stable and radioactive isotopes to trace atmospherically-deposited Pb in montane forest soils. Environmental Science and Technology, vol. 37, pp. 3560-3567.

Kaste JM, Norton SA, and Hess CT (2002) Environmental Chemistry of Beryllium-7: Mineralogical Society of America, Special Volume 50, 271-289

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