Abstract
The atmospheric deposition of some major components (e.g., NO3-N 6.6 and 14.5; SO4-S 17.8 and 42.4 kg ha−1 a−1) and trace elements (e.g., Cd 0.4 and 1.1, Cu < 1.9 and 15, Pb 43 and 48 g ha−1 a−1) in bulk and throughfall deposition respectively, shows a pronounced decline in recent measurements of total deposition in the eastern Erzgebirge (Germany). This is true for both bulk and throughfall deposition in 1992–1994 as compared to similar data from 1985–1989. The decline is a result of successful emission control strategies in central Europe and the shut down of plants and factories in the former GDR.
The dry deposition at the highest (influenced by long-range transport) and the lowest station (local influences) shows distinct differences (e.g., Cd 0.6 and 0.3; Cu 17.4 and 7.3; Pb 13 and 31 ng m−3). A comparison between total and dry deposition exhibits the different behavior of elements in respect to atmospheric concentrations and solubility in (rain)water. Anthropogenically released elements are mainly immited via wet deposition.
A comparison of element fluxes from the atmospheric input via dissolved and paniculate transport in streams to local reservoir sediments as a sink show the relative importance of the atmospheric input in a 105 km2 catchment (e.g., atmospheric Pb input 470 kg a−1, dissolved transport 50 kg a−1, particulate transport 950 kg a−1, and annual sediment accumulation 1100 kg a−1; atmospheric Zn input 3500 kg a−1, dissolved transport 5400 kg a−1, particulate transport 750 kg a−1, and sediment accumulation 5000 kg a−1). While atmospheric Pb accounts for more than 30% of the total element throughput, Zn is being introduced to almost 60% via the atmosphere.
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Matschullat, J., Kritzer, P. & Maenhaut, W. Geochemical fluxes in forested acidified catchments. Water Air Soil Pollut 85, 859–864 (1995). https://doi.org/10.1007/BF00476937
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DOI: https://doi.org/10.1007/BF00476937