Trends in airborne particulates in Stuttgart, Germany: 1972-2005.
Since 1972, at the University of Hohenheim in Stuttgart, Germany, airborne particulate matter (PM12 and then PM10) was continuously collected on filters and analyzed for environmentally relevant elements by X-ray fluorescence analysis. The resulting long-term time series are suitable for the investigation of trends and of seasonal variation. For the period 1972-2005, monthly and annual concentration mean values of 13 elements (Br, Ca, Cr, Cu, Fe, K, Mn, Ni, Pb, S, Ti, V, and Zn) in the air are presented. Trend curves were fitted and the mean yearly variation of the concentration for these elements was calculated and represented graphically. All trend curves show a diminution of the air pollution during this period, but to different extents. Mean trends in percent per year were calculated for each element both for the entire investigation period and for three data subsets of 10-11 years. Possible explanations are discussed in detail.
Cercasov
Vadim
V
University of Hohenheim, Institute of Physics and Meteorology, 70593 Stuttgart, Germany. cercasov@yahoo.de
Wulfmeyer
Volker
V
D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D005858:Germany; D008670:Metals / Q000032:analysis*; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D013995:Time; D001335:Vehicle Emissions
D000393:Air Pollutants; D008670:Metals; D052638:Particulate Matter; D001335:Vehicle Emissions