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Download Atmospheric Pollutants in Forest Areas: Their Deposition and by A. W. M. Vermetten, P. Hofschreuder, H. Harssema (auth.), PDF

By A. W. M. Vermetten, P. Hofschreuder, H. Harssema (auth.), H.-W. Georgii (eds.)

In November 1981 a primary symposium with the themes of "Acid Deposition of Atmospheric pollution" was once organised in OberursellTaunus to introduce the issues and primary result of research-activities on rainy and dry deposition of pollution and on acid precipitation. meanwhile the threat to woodland and crops turned extra dramatic and research-projects to enquire the enter of pollution to forest-ecosystems were initiated by way of numerous interdisciplinary teams. The swiftly expanding curiosity within the difficulties of wooded area­ decay and the numerous open questions with appreciate to the prognosis of the forest-damage have been the historical past for the enterprise of a moment symposium which was once held in November 1985 on the comparable place in Oberursel/Taunus. It used to be often involved in new thoughts of sampling and interpreting pollution in woodland parts. in addition to deposition, one vital pathway of toxins in orographic terrain is the interception of fog-droplets by means of crops. precise emphasis was once laid at the chemical composition of fog. The symposium effectively assembled scientists from the sector of atmospheric learn with these learning the impression of toxins on timber and plants in an effort to lessen the numerous open questions in reference to woodland desease. The court cases provided during this quantity are a considerable contribution to the knowledge of deposition and interception of pollution in forest-areas. due to the authors the quantity includes a lot of recent examine ·results and provides as a result a real photo of our current knowledge.

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O. Box 1308 0-3510 Hann. MUnden ABSTRACT. The present situation is reported for open field precipitation input of 4 anions and 13 cations sampled during a state-wide pilot study covering three time periods totaling four months. Furthermore, results of comparisons between open area and adjoining spruce stands are presented. The annual average concentration and depOSition rate for 1982 and 1983 are shown for 3 different locations in the Reinhardswald Research Area as well as for the time period October 1983 - September 1984 at several locations in the Research Areas Konigstein, Grebenau and Witzenhausen.

7 shows this correlation to be found at all three forest stations in the same way. Certain elements appear with remarkable high values. Considerable enrichments in throughfall caused by the leaching of leafs respectively needles have to be taken into account in case of Mn and K (Hoiken and Gravenhorst, 1982; Ulrich, 1983). Possible deposition of gases with following oxidation might influence the results in case of S04- and N03-. No explanation can be given in case of the unusual high ratio of Cr.

6. 7. 8. 9. 10. 11. 12. 13. 14. 15. ,84 +,61 18 18 18 18 18 17 18 18 18 17 18 18 16 --- +,61 19 19 19 19 19 18 19 19 19 18 19 19 17 18 --- TABLE 2 'Wdl' station Witzenhausen: rank correlation coefficient according to Kendall period: 15 Apr 1984 - 25 Dec 1984 1. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. ,55 ---. ,18 -,04 +,33 +,27 +,27 +,08 +,24 +,20 ---. 27 +,66 +,69 --- SOrCONCENTRATIONS, IMMISSION-RATES, AND BULK PRECIPITATION DATA 31 according to Kendall (8,9,10) was calculated considering the ties because a normal distribution was not expected; and it was attempted to reduce by this the effect of outliers on the correlation coefficients.

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