By H. Bingemer (auth.), Fritz Herbert (eds.)
This colloquium on Atmospheric hint materials held in Mainz on July 1, 1981, used to be a joint one-day assembly of all medical operating teams of the SFB-73. the aim of this assembly used to be to supply a pretty extensive and accomplished evaluation of the SFB-73 examine paintings over the past years and to debate the kingdom and the issues in addition to attainable destiny advancements of a number of the tasks. in line with the medical software of the SFB, the assembly consisted of 2 separate periods dedicated to genuine examine difficulties of hint gases (session I) in addition to aerosol debris (session II) within the atmospheric surroundings. As in earlier years, all the 14 partial tasks provided its efforts at the very least by means of one study contribution. In approximately twenty papers and discussions, tools, effects and the current kingdom of artwork in addition to quite a variety of open questions within the experimental and theoretical reviews should be defined. the diversity of themes thought of will be gauged from the contents of this booklet. The court cases comprise just about all papers offered on the colloquium. those papers were issued as quick as attainable. many of the authors dedicated huge efforts to maintain inside of tight time and area points in time. it's a excitement to recognize those efforts the following. a number of variety of papers, besides the fact that, may perhaps in simple terms be re· ceived with a substantial time extension and this regrettably triggered an article hold up of numerous months.
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Additional info for Atmospheric Trace Constituents: Proceedings of the 5th Two-Annual Colloquium of the Sonderforschungsbereich 73 of the Universities Frankfurt and Mainz and the Max-Planck-Institut Mainz, Held in Mainz, Germany, on 1 July 1981
R. Met. , 93, 494-500 - 41 - Measurements Relating to the Heterogeneous S02-0xidation in the Atmosphere w. Jaeschke Referat fur Umweltschutz, J. W. Goethe·Universitiit Frankfurt/Main, FRG 5 u m mar y. Measurements relating to the heterogeneous 502- oxidation in the atmosphere, have been performed in the field and in the laboratory. Besides phenomenological measurements of the chemical composition of heterogeneous systems, field exper iments have been per formed to get a previous approximate calulation of the magnitude of a first order removal coefficient of 502 in the real atmosphere.
U m mar y: Calculation methods of the vertical diffusivity coefficients,the transport and the deposition velocity of a trace constituent in the ABL are presented. For determing actual values and profiles these methods are applicable to field measurements obtained from instrumented towers or boundary layer soundings. The theoretical concept is general enough to enable numerical evaluations at variable stability conditions in the atmosphere. 1. INTRODUCTION A number of atmospheric features, thermal stability, baroclinicity, the momentum of upper level winds, topographic and surface layer characteristics as well as transfer resiatances combine together to predict the turbulence parameters which are responsible for transport, dispersion and deposition of trace constituents in the ABL.
So, Fig. 1: Vertical profiles of 302 mixing ratio over Europe, 1978 - 1980. Error bars correspond to 10. The tropopause is indicated by the arrow. - 56 Tab. 5 average distance to the tropopause km -5 -3 -1 tional to the gradient one might expect only a very small amount of S02 flux from the troposphere to the stratosphere. Obviously the estimate of this flux requires the knowledge of the effective eddy diffusion coefficient at the tropopause level (see below). 2 MEASUREMENTS UNDER CONDITIONS OF A DISTURBED TROPOPAUSE As previous observations have indicated (Georgii and Meixner, 1980) the S02 profiles obtained in the effective range of the polar-front jet stream are characterized by repeated and well-marked changes of the sign of the vertical gradient.