Results 261 to 270 of about 305,273 (287)

Wet acid deposition episodicity in Spain

Toxicological & Environmental Chemistry, 1997
Wet deposition of acidifying pollutants in Spain is analyzed to study its episodic behaviour. That is, a small proportion of events contribute a large portion of the annual deposition. The spatial and temporal patterns in episodicity are examined showing a very high pollutants episodicity.
L. Gimeno, E. Hernández
openaire   +1 more source

Wet deposition studies of hydraulic mortars

Materials and Structures, 1999
Cement mortars and lime-pozzolan mortars have been exposed to wet/drying cycling of ‘acid rain’ solution, using realistic presentation rates, to simulate outdoor conditions. Cement type, water/cement ratio, and curing temperature were also examined.
S. Martínez-Ramírez, G. E. Thompson
openaire   +1 more source

Wet deposition of elemental carbon in Lithuania

Science of The Total Environment, 1999
Elemental carbon (EC) was measured in monthly precipitation samples at 14 rural sites in Lithuania from December 1986 to June 1990. The amount of EC in the sample was determined by the light reflectance method after a procedure including the filtration through a 0.2-micron polyamide membrane filter, the chemical digestion of biogenic material and the ...
openaire   +2 more sources

Atmospheric Wet Depositions in Tropical America

Israel Journal of Chemistry, 1994
AbstractThe chemical composition of wet depositions at a “natural” regional scale and in local polluted areas in tropical America is reviewed. The available data indicate that at large regional scales, atmospheric wet depositions in tropical America are little affected by anthropogenic emissions, and that rain concentrations of non‐sea‐salt sulfate ...
Eugenio Sanhueza, Magaly Santana
openaire   +1 more source

Stability charts for wet conical deposits

International Journal of Mining and Geological Engineering, 1987
Presented are results of a 3-D limit-equilibrium stability analysis of wet conical deposits. A simplified methodology to include the effect of increased pore pressures, resulting from a brief and heavy rainfall, is suggested. The results, condensed into charts, enable one to estimate the factor of safety of a conical heap.
D. Leshchinsky, T. L. Mullett
openaire   +1 more source

Estimation of Wet Deposition Via Fog

1988
Measurements of the chemical composition of fog/cloud water at two mountain sites in West Germany are presented. The amount of deposited water in a fir forest by fog/cloud droplet interception is assessed using the cloud droplet deposition model of Lovett (1984). The model input data are taken from regular meteorological observations.
G. Kroll, P. Winkler
openaire   +1 more source

Modelling Wet Deposition onto Elevated Topography

1988
Models predicting deposition rates of chemical species onto the surface of hills by washout and turbulent deposition have been developed. The models include aqueous phase sulphur dioxide chemistry which is allowed to proceed within an evolving dynamical-microphysical framework.
T. A. Hill, A. Jones, T. W. Choularton
openaire   +1 more source

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
openaire   +1 more source

Intercomparison of Wet-Only Collectors for Measuring Wet Deposition

1990
20 precipitation wet only collectors of 11 different designs have been investigated in a field intercomparison. For the bulk ions, deviations between the various types exceeded 20%. For the trace metals, even larger differences occurred. Three main reasons were made responsible: 1. Poor sensitivity of precipitation sensors.
openaire   +1 more source

Climate, Air Pollutants, and Wet Deposition

2017
One main topic of scientific and public interest regarding the Waldstein research site continues to be the high-quality observation of weather and air quality that captures the meteorology and climate of this particular site and the neighboring regions.
Johannes Lüers, Barbara Grasse, Thomas Wrzesinsky, Thomas Foken   +3 more
openaire   +1 more source