Deposition of Atmospheric Pollutants: Proceedings of a Colloquium Held at Oberursel/Taunus, West Germany, 9-11 November 1981

ISBN-13: 9789400978669 / Angielski / Miękka / 2013 / 217 str.

H. W. Georgii;J. Pankrath

Opis

The problern of "acid precipitation" has been recognized with growing concern in many industrialized countries. The incorporation of pollutants into cloud and rain elements and their transfer to the ground by "wet deposition" are dominant mechanisms leading to a self~cleansing of the tro- posphere but, on the other hand, to hazards to the soil, vegetation and forests. The influence of orographic and meteorological parameters and of the regional distribution of precipitation on the deposition of pollutants are insuffi- ciently known factors. During previous years, several projects and analyses have been initiated to improve our knowledge on the dry and wet deposition of pollutants and on the mechanisms of transport of gaseaus and particulate components from the atmosphere to the ground. Research activities have been supported in different fields and it appeared not only useful but necessary to bring the different research-groups tagether to endorse the communication and cooperation between scientists in the related fields. A symposiumwas arranged in Oberurself Taunus in November 1981 to discuss the results of experimen- tal and theoretical work in the field of deposition and to gain a better understanding of each other's methods, experience and Observations. The proceedings presented in this volume permit a fair sur- vey of the present-day knowledge and will be a useful tool for all working in this field. The meeting would not have been possible without the finan- cial support of the German Environmental Agency {Umwelt- bundesamt) .

Spis treści

Comments on the investigation of the deposition of atmospheric pollutants.- Dry Deposition.- Field measurements of the dry deposition of small particles to grass.- On the vertical flux of gaseous ammonia above water and soil surfaces.- Dry deposition of particles: comparison of published experimental results with model predictions.- Dry deposition velocities of aerosol sulphate in rural eastern England.- Residence time and deposition of particle-bound atmospheric substances.- Wet Deposition.- Global distribution of the acidity in precipitation.- Deposition of acid in precipitation.- Composition of acid rain in the Federal Republic of Germany 2014 Spatial and temporal variations during the period 1979–1981.- Temporal variation of chemical composition of rainwater during individual precipitation events.- Investigations about wet deposition of pollutants in an urban ecosystem.- Neutralization of acid in precipitation and some results of sequential rain sampling.- The Influence of immediate freezing on the chemical composition of rain-samples.- Seasonal and regional distribution of polycyclic aromatic hydrocarbons in precipitation in the Rhein-Main-area.- Wet deposition of toxic metals from the atmosphere in the Federal Republic of Germany.- Atmospheric removal of airborne metals by wet and dry deposition.- Trace element measurements in wet and dry deposition and airborne particulate at an urban site.- Deposition on plants and vegetation.- Concentration of aerosolcconstituents above and beneath a beech and a spruce forest canopy.- Deposition of atmospheric aerosol particles to beech- and spruce forest.- Calculation of deposition rates from the flux balance and ecological effects of atmospheric deposition upon forest ecosystems.- Effects of atmospheric pollutants on materials; research needs.- List of participants.