Results 241 to 250 of about 1,726,040 (290)
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Atmospheric Environment (1967), 1978
Abstract SO2 concentration gradient measurements are reported, which have been carried out between May 1975 and September 1976 at the Kernforschungsanlage Julich. Most of the measurements were made with differential optical absorption spectroscopy. Mirrors at various heights (30, 80, 120m) on the meterological tower were used to reflect the light ...
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Abstract SO2 concentration gradient measurements are reported, which have been carried out between May 1975 and September 1976 at the Kernforschungsanlage Julich. Most of the measurements were made with differential optical absorption spectroscopy. Mirrors at various heights (30, 80, 120m) on the meterological tower were used to reflect the light ...
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Dry Particulate Nitrate Deposition in China
Environmental Science & Technology, 2017A limited number of ground measurements of dry particulate nitrate deposition (NO3-) makes it difficult and challenging to fully know the status of the spatial and temporal variations of dry NO3- depositions over China. This study tries to expand the ground measurements of NO3- concentrations at monitoring sites to a national scale, based on the Ozone ...
Lei Liu +12 more
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Dry deposition of so2 on agricultural crops
Atmospheric Environment (1967), 1978Abstract A micrometeorological method has been used to estimate dry deposition rates of sulphur dioxide on agricultural crops from vertical gradients of SO2 concentration, windspeed and air temperature above the crop surface. Field measurements in a wide range of atmospheric and surface conditions enabled analysis of the results to separate the ...
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Measurement of dry deposition of ammonia on a forest
Environmental Pollution, 1992Ammonia concentration gradients above a Douglas fir canopy were measured from 16 August to 31 December 1989 by two automated high-precision thermodenuders at the location Speulderbos in The Netherlands. Concentration gradients were used to calculate the dry deposition flux of ammonia via flux-gradient theory.
G P, Wyers, A T, Vermeulen, J, Slanina
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Wet and dry deposition of Chernobyl releases
Nature, 1988The passage of the Chernobyl plume over the United Kingdom in May 1986 led to the deposition of radionuclides on the ground by wet and dry deposition processes. Here we analyse rainfall during the passage of the plume and the published monitoring data obtained afterwards, and show that levels of deposited 137Cs can be closely related to rainfall ...
M J, Clark, F B, Smith
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Dry deposition on a snow surface
Atmospheric Environment (1967), 1976Deposition velocities for airborne lead and sulphur to a snow surface over one 2-week period have been estimated by measuring the amount of lead and sulphate accumulated in the snow, and air concentrations of lead, SO2 and sulphate 2 m above the surface. The average deposition velocity found for lead is 0.0016 m s−1.
Harald Dovland, Anton Eliassen
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Water, Air, and Soil Pollution, 1989
Data collected during 1986 at seven widely separated sites in the eastern United States were used to estimate weekly averages of deposition velocities for SO2, O3, HNO3, and SO inf4 sup2− with both a modified version of the RADM dry deposition module and a site-specific inferential technique developed by the Atmospheric Turbulence and Diffusion ...
M. L. Wesely, B. M. Lesht
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Data collected during 1986 at seven widely separated sites in the eastern United States were used to estimate weekly averages of deposition velocities for SO2, O3, HNO3, and SO inf4 sup2− with both a modified version of the RADM dry deposition module and a site-specific inferential technique developed by the Atmospheric Turbulence and Diffusion ...
M. L. Wesely, B. M. Lesht
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Drying of Latex Rubber Deposits
Rubber Chemistry and Technology, 1949Abstract In conclusion, it may be stated that the general principles of drying latex rubber deposits are much the same as for drying any other article, but there are conditions present that make drying more difficult. The porosity of the deposits decreases as drying proceeds; consequently the diffusion of the water through the deposits is ...
E. G. Partridge, M. E. Hansen
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Dry Deposition Monitoring in Europe
Water, Air and Soil Pollution: Focus, 2001Between 1993 and 1999 two EU funded projects wereexecuted aimed at (i) the development of drydeposition monitoring methods for core sites andlarge scale application, (ii) the installation andrunning of three core sites in Europe and (iii) the improvement and validation of models used forregional application.
J. W. Erisman +10 more
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1982
This contribution reviews the subject of wet and dry deposition. The various precipitation scavenging processes, and factors which influence them are described. A brief quantitative description of scavenging rate coefficients and washout ratios is given.
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This contribution reviews the subject of wet and dry deposition. The various precipitation scavenging processes, and factors which influence them are described. A brief quantitative description of scavenging rate coefficients and washout ratios is given.
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