By Dr. J. Pankrath (auth.), H.-W. Georgii, J. Pankrath (eds.)
Read or Download Deposition of Atmospheric Pollutants: Proceedings of a Colloquium held at Oberursel/Taunus, West Germany, 9–11 November 1981 PDF
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Extra resources for Deposition of Atmospheric Pollutants: Proceedings of a Colloquium held at Oberursel/Taunus, West Germany, 9–11 November 1981
The results show a great improvement of the performance of the laboratories from the first to the third testseries, the variability of the data furnished by the individual laboratories decreased. However, for sulfate and nitrate the variation is still considerable. The evaluations of the test-series give only an indication with respect to the performance of the laboratories as a group. · W. Georgii and J. ), Deposition of Atmospheric PoUutants, 55-66. Copyright© 1982 b;y D. Reidel Publishing Company.
In context with the problern of the so-called "acid rain", the pH-value is one parameter of special interest. Fig. 1 shows the spatial distribution of pH for the year 1972. It can be seen that in Central Europe pH-values as low as 4 are found with increasing values towards the oceans but also towards Eastern Europe. Over the North American continent relatively high pH-values were observed over the middle and Western part of the US. 5. From 1972 to 1979 the number of reporting stations has considerably increased.
32 field Chamberlain /2/ Clough /4/ -v3 wind tunnel 26 E. MARGGRANDER AND D. 2 'ii ! ----------~----------~--------~ ~01 011 10 porticle diometer Fig. 1: Depositionvelocity as a function of particle diameter and friction velocity u* , predicted by Sehmel and Hodgson /1/. 0 cm. • 0 neutral stab1l1ty. ~m DRY DEPOSITION OF PARTICLES 10 27 I I I I I. l v" >V"- Selvnel - :... _ J_ ! I I V"•'\1- Sellme«- e "'.. t grass o sticky ortiliciol gross (PVC I .. 1 Tl~ "' lf Il rt l q rough gloss towelling (wet) - I I I 1,0 1,5 2,0 I I I I i "'..