Results 251 to 260 of about 295,977 (302)

Atmospheric deposition sampler intercomparison

Water, Air, and Soil Pollution, 1988
Two wet/dry atmospheric deposition sampler types were compared for 1 yr. The resistance required to open each of ten collectors was determined. Additionally, the opening and closing history of each sampler was recorded using a microdatalogger with a resolution of 1 min.
RichardC. Graham, JohnK. Robertson, Leroy Schroder   +2 more
openaire   +1 more source

Atmospheric Deposition to Forest Ecosystems

2013
Abstract Atmospheric deposition is an important source of macro- and micronutrients to the forest and also the most important channel for input of long-range air pollutants. This chapter describes the methods used for the determination of atmospheric deposition, especially in rain and snow, in forest ecosystems, including samplers for open-field bulk
Karin Hansen, Anne Thimonier, Nicholas Clarke, Jeroen Staelens, Daniel Zlindra, Peter Waldner, Aldo Marchetto   +6 more
openaire   +3 more sources

Lake Ontario atmospheric deposition 1969–1978

Water, Air, and Soil Pollution, 1982
Nine years of atmospheric deposition data have been analyzed from six locations along the Canadian shore of Lake Ontario. Results indicate that atmospheric deposition is affected by large scale air masses which influence the entire northern shore, and local inputs which at times could mask the large scale air masses effects.
C. H. Chan, K. W. Kuntz
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Atmospheric deposition in complex forest landscapes

Boundary-Layer Meteorology, 1994
Atmospheric dry deposition in eight forest edges was estimated by means of throughfall and bulk precipitation measurements. Dry deposition was found to be enhanced in the first 5 edge heights. Deposition enhancement was strongly dependent on forest density, edge aspect and on the gas or particle under consideration.
Draaijers, GPJ, van Ek, R, van Bleuten, W   +2 more
openaire   +2 more sources

Deposition of atmospheric ammonia to moorlands

Environmental Pollution, 1992
Micrometeorological methods were applied to measure fluxes of atmospheric ammonia (NH3) to moorlands. Measurements were made in a wide variety of surface conditions and included both Calluna vulgaris (L.) Hull and Eriophorum vaginatum L. dominated sites.
Sutton, M.A., Moncrieff, J B, Fowler, D.
openaire   +3 more sources

Atmospheric PAH Deposition: Deposition Velocities and Washout Ratios

Journal of Environmental Engineering, 2002
The urban snowpack effectively acts as a collection device for atmospheric-deposited PAHs. When these PAHs are flushed out in a short time interval along with springtime snowmelt, these cause shockloading to receiving waters. The assessment of PAH deposition, accumulation, and possibly remediation of PAHs in urban snowpacks requires an understanding of
Mukesh Sharma, Edward A. McBean
openaire   +1 more source

Atmospheric Deposition Processes

1993
Dry, wet, and occult (cloud drop) deposition all contribute to the removal of compounds from the atmosphere. Many atmospheric species undergo chemical and physical transformations which affect their removal rates. Deposition rates depend on the nature of both the compounds and the surfaces at which they deposit.
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Forest canopy transformation of atmospheric deposition

Water, Air, and Soil Pollution, 1988
Solute fluxes to the ground in open plots and under the forest canopy of different species were investigated in a number of long-term ecosystem studies in West Germany. From the canopy flux balance, rates of interception deposition and canopy/deposition interactions were assessed. Chemically, both open precipitation and throughfall are dilute solutions
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The national atmospheric deposition program

Applied Geochemistry, 1995
A total number of 1165 stream water and 1172 lake water samples were collected in two different projects in the autumns of 1990 and 1987, respectively. The sampling points in streams were determined to include a drainage area of ca 30 km2. The lakes were selected to represent the lakes in the size range of 0.01–10 km2.
Pertti Lahermo, Jaakko Mannio, Timo Tarvainen   +2 more
openaire   +1 more source

Atmospheric metal deposition in London

International Journal of Environmental Studies, 1983
Few measurements of deposition rates of metals other than lead have been reported for urban areas in the United Kingdom. The present paper describes the measurements made over a period of several months of ten metals at eight sites in Greater London. Metal deposition was monitored with moss bags and total deposition collectors, and some measurements ...
Michael J. Duggan, M. Agneta S. Burton
openaire   +1 more source