Modelling of black carbon statistical distribution and return periods ofextreme concentrations ?
BC concentrations in Warsaw are higher than in Western European capitals. Regional background BC levels in Upper Silesia district are high, especially during winter. One or two daily peaks are observed depending on the dominating emission source and season. Lognormal distribution presents the best fit to the middle-range BC concentrations. Return periods of extreme BC wintertime concentrations were estimated.
black carbon return period atmospheric aerosol statistical modelling frequency distribution daily profile poland