Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prediction of air pollution frequency distribution — Part I. The lognormal model
Abstract The dependence of air pollution frequency distributions on wind direction was investigated by dividing SO2 data sets obtained in the Rijnmond industrial area (the Netherlands) into subsets according to wind direction. From three of these data sets the following empirical relation was derived: the frequency distribution of each subset turns out to be lognormal with the logarithmic standard deviation equal to 0.76 for hourly concentration measurements. This empirical relation was tested on ten data sets by estimating overall 98-percentiles from observed long-term average concentrations within subsets. The estimated 98-percentiles deviated by at most 15 % from the observed 98-percentiles. It is concluded that the empirical assumption is suited for quick estimates of changes in frequency distributions due to the introduction of new sources in a complex source area, when the contribution of the new sources to the long-term average concentration within wind direction sectors can be computed.
Prediction of air pollution frequency distribution — Part I. The lognormal model
Abstract The dependence of air pollution frequency distributions on wind direction was investigated by dividing SO2 data sets obtained in the Rijnmond industrial area (the Netherlands) into subsets according to wind direction. From three of these data sets the following empirical relation was derived: the frequency distribution of each subset turns out to be lognormal with the logarithmic standard deviation equal to 0.76 for hourly concentration measurements. This empirical relation was tested on ten data sets by estimating overall 98-percentiles from observed long-term average concentrations within subsets. The estimated 98-percentiles deviated by at most 15 % from the observed 98-percentiles. It is concluded that the empirical assumption is suited for quick estimates of changes in frequency distributions due to the introduction of new sources in a complex source area, when the contribution of the new sources to the long-term average concentration within wind direction sectors can be computed.
Prediction of air pollution frequency distribution — Part I. The lognormal model
Cats, G.J. (Autor:in) / Holtslag, A.A.M. (Autor:in)
Atmospheric Environment ; 14 ; 255-258
05.09.1979
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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