Publications
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Filter Total Items: 205
Evasion of added isotopic mercury from a northern temperate lake Evasion of added isotopic mercury from a northern temperate lake
Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week intervals throughout the summer growing season for three consecutive...
Authors
G. Southworth, S. Lindberg, H. Hintelmann, M. Amyot, A. Poulain, M. Bogle, M. Peterson, J. Rudd, R. Harris, K. Sandilands, David P. Krabbenhoft, Mark L. Olsen
Local and regional factors affecting atmospheric mercury speciation at a remote location Local and regional factors affecting atmospheric mercury speciation at a remote location
Atmospheric concentrations of elemental (Hg0), reactive gaseous (RGM), and particulate (PHg) mercury were measured at two remote sites in the midwestern United States. Concurrent measurements of Hg0, PHg, and RGM obtained at Devil's Lake and Mt. Horeb, located approximately 65 km apart, showed that Hg0 and PHg concentrations were affected by regional, as well as local sources, while RGM...
Authors
H. Manolopoulos, J.J. Schauer, M.D. Purcell, T.M. Rudolph, Mark L. Olson, B. Rodger, David P. Krabbenhoft
Mercury in water and biomass of microbial communities in hot springs of Yellowstone National Park, USA Mercury in water and biomass of microbial communities in hot springs of Yellowstone National Park, USA
Ultra-clean sampling methods and approaches typically used in pristine environments were applied to quantify concentrations of Hg species in water and microbial biomass from hot springs of Yellowstone National Park, features that are geologically enriched with Hg. Microbial populations of chemically-diverse hot springs were also characterized using modern methods in molecular biology as...
Authors
S.A. King, S. Behnke, K. Slack, D. P. Krabbenhoft, D. Kirk Nordstrom, M.D. Burr, Robert G. Striegl
Atmospheric mercury speciation in Yellowstone National Park Atmospheric mercury speciation in Yellowstone National Park
Atmospheric concentrations of elemental mercury (Hg0), reactive gaseous Hg (RGM), and particulate Hg (pHg) concentrations were measured in Yellowstone National Park (YNP), U.S.A. using high resolution, real time atmospheric mercury analyzers (Tekran 2537A, 1130, and 1135). A survey of Hg0 concentrations at various locations within YNP showed that concentrations generally reflect global...
Authors
B.D. Hall, M.L. Olson, A.P. Rutter, R.R. Frontiera, D. P. Krabbenhoft, D.S. Gross, M. Yuen, T.M. Rudolph, J.J. Schauer
Investigation of mercury exchange between forest canopy vegetation and the atmosphere using a new dynamic chamber Investigation of mercury exchange between forest canopy vegetation and the atmosphere using a new dynamic chamber
This paper presents the design of a dynamic chamber system that allows full transmission of PAR and UV radiation and permits enclosed intact foliage to maintain normal physiological function while Hg(0) flux rates are quantified in the field. Black spruce and jack pine foliage both emitted and absorbed Hg(0), exhibiting compensation points near atmospheric Hg(0) concentrations of ∼2−3 ng...
Authors
J.A. Graydon, Louis, S.E. Lindberg, H. Hintelmann, D. P. Krabbenhoft
Analysis of mercury wet-deposition data collected with a newly designed sampler, Boston, Massachusetts metropolitan area, 2002-04 Analysis of mercury wet-deposition data collected with a newly designed sampler, Boston, Massachusetts metropolitan area, 2002-04
No abstract available.
Authors
Ann Chalmers, Mark A. Nilles, David P. Krabbenhoft, Eric Prestbo
Speciation and transport of newly deposited mercury in a boreal forest wetland: A stable mercury isotope approach Speciation and transport of newly deposited mercury in a boreal forest wetland: A stable mercury isotope approach
As part of the Mercury Experiment to Assess Atmospheric Loadings in Canada and the United States (METAALICUS) the fate and transport of contemporary mercury (Hg) deposition in a boreal wetland was investigated using an experimentally applied stable mercury isotope. We applied high purity (99.2% ± 0.1) 202Hg(II) to a wetland plot to determine if (1) the 202Hg was detectable above the pool...
Authors
B.A. Branfireun, D. P. Krabbenhoft, H. Hintelmann, R. J. Hunt, J.P. Hurley, J.W.M. Rudd
Assessing the potential for re-emission of mercury deposited in precipitation from arid soils using a stable isotope Assessing the potential for re-emission of mercury deposited in precipitation from arid soils using a stable isotope
A solution containing 198Hg in the form of HgCl2 was added to a 4 m2 area of desert soils in Nevada, and soil Hg fluxes were measured using three dynamic flux chambers. There was an immediate release of 198Hg after it was applied, and then emissions decreased exponentially. Within the first 6 h after the isotope was added to the soil, ∼12 ng m-2 of 198Hg was emitted to the atmosphere...
Authors
J.A. Ericksen, M.S. Gustin, S.E. Lindberg, S.D. Olund, D. P. Krabbenhoft
Mercury concentrations in water from an unconfined aquifer system, New Jersey coastal plain Mercury concentrations in water from an unconfined aquifer system, New Jersey coastal plain
Concentrations of total mercury (Hg) from 2 μg/L (the USEPA maximum contaminant level) to 72 μg/L in water from about 600 domestic wells in residential parts of eight counties in southern New Jersey have been reported by State and county agencies. The wells draw water from the areally extensive (7770 km2) unconfined Kirkwood–Cohansey aquifer system, in which background concentrations of...
Authors
J. L. Barringer, Zoltan Szabo, L. J. Kauffman, T. H. Barringer, P. E. Stackelberg, T. Ivahnenko, S. Rajagopalan, D. P. Krabbenhoft
Pacific volcanoes, mercury contaminated fish, and polynesian taboos Pacific volcanoes, mercury contaminated fish, and polynesian taboos
No abstract available.
Authors
John Dellinger, Jean Hudson, David Krabbenhoft, M.E. Hinano Murphy
Mercury transport in a high-elevation watershed in Rocky Mountain National Park, Colorado Mercury transport in a high-elevation watershed in Rocky Mountain National Park, Colorado
Mercury (Hg) was measured in stream water and precipitation in the Loch Vale watershed in Rocky Mountain National Park, Colorado, during 2001–2002 to investigate processes controlling Hg transport in high-elevation ecosystems. Total Hg concentrations in precipitation ranged from 2.6 to 36.2 ng/L and showed a strong seasonal pattern with concentrations that were 3 to 4 times higher during...
Authors
M.A. Mast, K. Campbell, D. P. Krabbenhoft, Howard E. Taylor
Sediment remobilization of Mercury in South San Francisco Bay, California Sediment remobilization of Mercury in South San Francisco Bay, California
No abstract available.
Authors
Brent R. Topping, James S. Kuwabara, Mark C. Marvin-DisPasquale, Jennifer L. Agee, Le H. Kieu, John R. Flanders, Francis Parcheso, Stephen W. Hager, Cary B. Lopez, David P. Krabbenhoft