Results 251 to 260 of about 1,134,844 (292)

Dry and Wet Deposition

1990
Deposition phenomena are the way in which the atmosphere cleans itself. The process is efficient as only a few gases (most notably CO 2) show signs of global increase in spite of the large emission of pollutants from both natural and anthropogenic sources.
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Wet deposition of ammonium in Europe

Journal of Atmospheric Chemistry, 1988
Ammonium concentration data in precipitation have been compiled to derive a concentration and deposition field for ammonium in Europe. Measurements referring to a total number of 218 measuring sites have been considered. Because of changes in the ammonium concentrations due to the use of improper sampling procedures, a correction procedure is proposed.
Ed Buijsman, Jan-Willem Erisman
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Wet Deposition of Polychlorinated Biphenyls in the Eastern Mediterranean

Environmental Science & Technology, 2004
The concentrations of polychlorinated biphenyls (PCBs) were measured in rain samples collected from a semiurban and a marine background site of the eastern Mediterranean. The concentration of sigmaPCB (sum of 54 PCB congeners) in the city of Heraklion (2.9 +/- 1.9 ng L(-1)) was not significantly higher than the corresponding concentration measured at ...
Manolis, Mandalakis, Euripides G, Stephanou   +1 more
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Aldehyde concentrations in wet deposition and river waters

Science of The Total Environment, 2013
The process of pollutants removal from the atmosphere can be responsible for the appearance of aldehydes in surface waters. We observed that formaldehyde, acetaldehyde, propanal, glyoxal, methylglyoxal and acetone were commonly present in precipitations as well as in surface water samples, while semi-volatile and poorly soluble aldehydes as nonanal and
Agata, Dąbrowska, Jacek, Nawrocki
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Atmospheric speciation and wet deposition of alkyllead compounds

Environmental Science & Technology, 1988
Concentrations of individual tetra-, tri-, and dialkyllead compounds have been measured in the gas phase and in aerosol and rainwater samples at two sites in eastern England and at one site in western Ireland. The results show a predominance of gas-phase over aerosol-associated species in the air at all sites, and in general a greater abundance of ...
A G, Allen, M, Radojevic, R M, Harrison
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Shrinking a wet deposition network

Atmospheric Environment, 1996
Abstract Suppose that we must delete stations from a monitoring network. Which stations should be deleted if we wish the remaining network to have the smallest possible trend estimate variances? We use the spatial-temporal model described in Oehlert (1993, J. Am. Statist.
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Endosulfan wet deposition in Southern Florida (USA)

Science of The Total Environment, 2014
The atmosphere is an important transport route for semi-volatile pesticides like endosulfan. Deposition, which depends on physical-chemical properties, use patterns, and climatic conditions, can occur at local, regional, and global scales. Adverse human and ecological impact may result.
Thomas L, Potter, Cathleen J, Hapeman, Laura L, McConnell, Jennifer A, Harman-Fetcho, Walter F, Schmidt, Clifford P, Rice, Bruce, Schaffer   +6 more
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Parameterization of Wet Deposition of Radionuclides

2006
Processes removing radionuclides from the atmosphere, and their interaction with the Earth’s surface, are very important for modeling atmospheric transport and consequences of nuclear accidental releases. However, in most long-range air pollution models the parameterizations used for the removal processes do not consider effects of nuclide particle ...
Alexander Baklanov, Jens Havskov Sørensen   +1 more
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Wet Deposition of Heavy Metals

1989
Macroscale and microscale processes of removal of atmospheric metals from the atmosphere by precipitation and fog water deposition are described. Methodologies for measuring wet deposition are critically examined. Finally, pitfalls in using historical measurements of metals deposition and scavenging ratios to estimate removal are discussed.
L. A. Barrie, R. S. Schemenauer
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Background wet deposition of mercury in Great Britain

Journal of Environmental Monitoring, 2010
Precipitation samples have been collected on a monthly basis from a network of 10 sites in Great Britain (GB) in order to estimate background mercury (Hg) deposition in the rural environment. Collection started in February 2005 and results presented here cover the period up to June 2009.
Rowland, A.P., Lawlor, A.J., Guyatt, H.J., Wadsworth, R.A.   +3 more
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