Search Results - "Keeler, G J"

Mercury accumulation in foliage over time in two northern mixed-hardwood forests by REA, A. W, LINDBERG, S. E, SCHERBATSKOY, T, KEELER, G. J

“…Concentrations of mercury (Hg) in live foliage increased ten-fold from spring bud break (mean ± std. dev. from bothsites: 3.5±1.3 ng g^sup -1^) to autumn…”
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Methyl and total mercury in precipitation in the Great Lakes region by Hall, B.D., Manolopoulos, H., Hurley, J.P., Schauer, J.J., St. Louis, V.L., Kenski, D., Graydon, J., Babiarz, C.L., Cleckner, L.B., Keeler, G.J.

“…Methylmercury (MeHg) and total mercury (THg) concentrations were measured in precipitation collected from five US sites in the Great Lakes region: three sites…”
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Domestic biomass fuel combustion and chronic bronchitis in two rural Bolivian villages by Albalak, R, Frisancho, A R, Keeler, G J

“…BACKGROUND Chronic bronchitis is an important public health problem worldwide. A study was undertaken to examine the association between exposure to air…”
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Mercury air/surface exchange kinetics of background soils of the Tahquamenon River watershed in the Michigan Upper Peninsula by ZHANG, H, LINDBERG, S. E, MARSIK, F. J, KEELER, G. J

“…Air/surface exchange of mercury was investigated over background soils at five sites in the Tahquamenon River watershed in the Michigan Upper Peninsula in the…”
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Regional differences in worldwide emissions of mercury to the atmosphere by Pirrone, Nicola, Keeler, Gerald J., Nriagu, Jerome O.

“…Annual emissions of anthropogenic Hg to the atmosphere in different regions of the world during the last decade show an interesting dichotomy: the emissions in…”
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Assessment of Dry Deposition and Foliar Leaching of Mercury and Selected Trace Elements Based on Washed Foliar and Surrogate Surfaces by Rea, Anne W, Lindberg, Steven E, Keeler, Gerald J

“…Throughfall and litterfall are the primary deposition pathways of Hg to forested ecosystems, yet the source of this Hg (soil or atmospheric) remains unclear…”
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Historical atmospheric mercury emissions and depositions in North America compared to mercury accumulations in sedimentary records by Pirrone, Nicola, Allegrini, Ivo, Keeler, Gerald J., Nriagu, Jerome O., Rossmann, Ronald, Robbins, John A.

“…Gold and silver production in North America (included United States, Canada and Mexico) released a large amount of mercury to the atmosphere until well into…”
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Isotopic record of lead pollution in lake sediments from the northeastern United States by Graney, J.R., Halliday, A.N., Keeler, G.J., Nriagu, J.O., Robbins, J.A., Norton, S.A.

“…Although it is common knowledge that Pb concentrations have increased in lake sediments in the northeastern United States over the last 150 years, the…”
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Critical Evaluation of a Modified Automatic Wet-Only Precipitation Collector for Mercury and Trace Element Determinations by Landis, Matthew S, Keeler, Gerald J

“…In 1993, the University of Michigan Air Quality Laboratory (UMAQL) designed a new wet-only precipitation collection system that was utilized in the Lake…”
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Assessing the Sources of Atmospheric Mercury Wet Deposited in Florida, USA by Dvonch, J. T., Morishita, M., Hall, N. L., Barres, J. A., Keeler, G. J.

“…From October 2008 through August 2010, event-based precipitation samples for mercury (Hg), trace elements, and major ions analysis were collected at six…”
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Assessing the Emission Sources of Atmospheric Mercury in Wet Deposition Across Illinois, USA by Gratz, L. E., Keeler, G. J., Dvonch, J. T., Morishita, M., Barres, J. A.

“…From August 2007 to August 2009, we collected event-based precipitation samples for mercury (Hg) and trace element analysis at four sites in Illinois, USA. The…”
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Applications of a Turf Surrogate Surface Sampling Technique in Measuring Mercury Dry Deposition in Florida, USA by Hall, N. L., Dvonch, J. T., Barres, J. A., Marsik, F. M., Keeler, G. J.

“…Atmospheric deposition of mercury (Hg) is a major process that contributes mercury loadings in ecosystems resulting in the bioaccumulation of mercury in fish…”
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Use of Elemental Tracers to Source Apportion Mercury in South Florida Precipitation by Dvonch, J. Timothy, Graney, Joseph R, Keeler, Gerald J, Stevens, Robert K

“…Source−receptor relationships for mercury (Hg) and other trace elements wet deposited in south Florida were investigated using daily event precipitation…”
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Factors controlling mercury transport in an upland forested catchment. [Erratum: Feb 1999, v. 110 (1/2), p. 213.] by Scherbatskoy, T, Shanley, J.B, Keeler, G.J

“…Total mercury (Hg) deposition and input/output relationships were investigated in an 11-ha deciduous forested catchment in northern Vermont as part of ongoing…”
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The deposition of mercury in throughfall and litterfall in the lake champlain watershed: A short-term study by Rea, Anne W., Keeler, Gerald J., Scherbatskoy, Timothy

“…As part of an ongoing study of the atmospheric deposition of Hg in the Lake Champlain watershed, event throughfall, event precipitation, ambient, green…”
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Dry Deposition Fluxes and Mass Size Distributions of Pb, Cu, and Zn Measured in Southern Lake Michigan during AEOLOS by Paode, Rajendra D, Sofuoglu, Sait C, Sivadechathep, Jakkris, Noll, Kenneth E, Holsen, Thomas M, Keeler, Gerald J

“…As part of the Atmospheric Exchange Over Lakes and Oceans Study (AEOLOS) the dry deposition fluxes and atmospheric size distributions (ASDs) of anthropogenic…”
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Sources of mercury in the Arctic by PACYNA, J. M, KEELER, G. J

“…Global and regional emission inventories of mercury are reviewed with special emphasis on the source regions with potential impact on the Arctic environment…”
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An investigation of source–receptor relationships for mercury in south Florida using event precipitation data by Dvonch, J.T, Graney, J.R, Marsik, F.J, Keeler, G.J, Stevens, R.K

“…A recent pilot study suggested that local anthropogenic sources may play an important role in the atmospheric deposition of mercury (Hg) in South Florida. To…”
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Atmospheric Mercury Deposition to Lake Michigan during the Lake Michigan Mass Balance Study by Landis, Matthew S, Keeler, Gerald J

“…Wet and dry mercury (Hg) deposition were calculated to Lake Michigan using a hybrid receptor modeling framework. The model utilized mercury monitoring data…”
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Dry Deposition of Semivolatile Organic Compounds to Lake Michigan by Pirrone, Nicola, Keeler, Gerald J, Holsen, Thomas M

“…A hybrid-receptor deposition modeling approach is used to estimate both gas exchange across the air-water interface and particle dry deposition of semivolatile…”
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