• Publications
  • Influence
234Th and particle cycling in the central equatorial Pacific
US JGOFS-EgPac234Th data sets for 1992 boreal spring (Survey I, TT007) and fall (Survey 11, TT011) cruises from 12°N to 12°S along 140°W were used to determine rates of234Th and particle cyclingExpand
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Dissolved and labile concentrations of Cd, Cu, Pb, and Zn in the South Fork Coeur d’Alene River, Idaho: Comparisons among chemical equilibrium models and implications for biotic ligand models
In order to evaluate thermodynamic speciation calculations inherent in biotic ligand models, the speciation of dissolved Cd, Cu, Pb, and Zn in aquatic systems influenced by historical miningExpand
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Modeling precipitation and sorption of elements during mixing of river water and porewater in the Coeur d'Alene River basin.
Reddish brown flocs form along the edge of the Coeur d'Alene River when porewater drains into river water during the annual lowering of water level in the basin. The precipitates are efficientExpand
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Modeling metal removal onto natural particles formed during mixing of acid rock drainage with ambient surface water.
Studies have examined partitioning of trace metals onto natural particles to better understand the fate and transport of trace metals in the environment, but few studies have compared modelExpand
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Predicting the toxicity of metal mixtures.
The toxicity of single and multiple metal (Cd, Cu, Pb, and Zn) solutions to trout is predicted using an approach that combines calculations of: (1) solution speciation; (2) competition andExpand
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Metal mixture modeling evaluation project: 2. Comparison of four modeling approaches.
As part of the Metal Mixture Modeling Evaluation (MMME) project, models were developed by the National Institute of Advanced Industrial Science and Technology (Japan), the US Geological Survey (USA),Expand
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Organic carbon to 234Th ratios of marine organic matter
Uncertainties in the determinations of particulate organic carbon flux from measurements of the disequilibrium between 234 Th and its mother isotope uranium depend largely on the determination of theExpand
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Assessing time-integrated dissolved concentrations and predicting toxicity of metals during diel cycling in streams.
Evaluating water quality and the health of aquatic organisms is challenging in systems with systematic diel (24 h) or less predictable runoff-induced changes in water composition. To advance ourExpand
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Geochemical Data for Selected Rivers, Lake Waters, Hydrothermal Vents, and Subaerial Geysers in Yellowstone National Park, Wyoming and Vicinity, 1996–2004
Analyses of more than 400 water samples collected from creeks and rivers draining into Yellowstone Lake, hydrothermal vents and water-column profiles within Yellowstone Lake, and subaerial hotExpand
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Assessing the concentration, speciation, and toxicity of dissolved metals during mixing of acid-mine drainage and ambient river water downstream of the Elizabeth Copper Mine, Vermont, USA
Abstract The authors determine the composition of a river that is impacted by acid-mine drainage, evaluate dominant physical and geochemical processes controlling the composition, and assessExpand
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