Abstract
Atmospheric aerosol samples were collected by six-stage low pressure impactors in Vienna downtown. Aerosol particles were deposited on aluminum foils in five size fractions in the size range of 0.04–25 μm AD. The concentration of the components Cl −, Br −, NO 3 −, SO 4 2−, Ca, Cu, Fe, Mg, Pb. Sr, Zn and total C was determined by multi-element analytical methods. A comparison of the relative composition of the size fractions containing nucleation mode and accumulation mode particles showed the components derived from traffic emissions (Pb, Br − and C) to be significantly enriched in the nucleation mode size fraction. On the other hand, each of the components Cl −, SO 4 2−,Ca, Cu, Fe, Mg and Sr has a similar relative concentration in the nucleation mode and in the accumulation mode size fraction. For all samples collected on days with prevailing westerly winds a strong negative correlation between wind speed and sulfate particle size as well as sulfate concentration was observed.
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