Bayreuther Institut für Terrestrische Ökosystemforschung
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Meteorology and air pollution in the Fichtelgebirge


From 01/1998 to 12/2000

Principal Investigator: Otto Klemm
Staff: Jörg Gerchau, Thomas Foken
Grant: 0339476 C Grundlagen zur nachhaltigen Entwicklung von Ökosystemen bei veränderter Umwelt

We analyzed 13 years of hourly measurements of SO2, NOx, and O3, at forest ecosystem research sites in SE Germany. A quasi continuous data record was obtained by combining data sets from two locations. Before interpreting trends in the combined data set, we analyzed if the change of location introduced a systematic bias. We employed autocorrelation functions, Hurst statistics, complexity analysis, and recurrence quantification and found that the partial data set exhibited no indication of the presence of any bias. For SO2, we also compared the data from the forest sites with data obtained in nearby cities and also found no indications for any systematic effects. Applying nonparametric trend statistics we found a significant decrease of the SO2. Most of the observed decrease is due to the reductions of SO2 emissions in eastern Germany, but reductions in western Germany and the Czech Republic also played important roles. For O3, we observed a significant increase, the causes of which are unclear from our data alone. For NOx, no trend was identified.(January 1999)

List of publications of this Project

Klemm, O; Stockwell, WR; Schlager, H; Krautstrunk, M: NOx or VOC Limitation in East German Ozone Plumes ?, Journal of Atmospheric Chemistry, 35, 1-18 (2000) -- Details
Foken, T; Mangold, A; Rebmann, C; Wichura, B: Characterization of a complex measuring site for flux measurements in Am. Meteorol. Soc.: Proc. Ninth Conference on Mountain Met, 239-240 (2000)
Foken, T: Messung von Wasser- und Stoffumsätzen im heterogenen Gelände in Universität Göttingen; Geographisches Institut; Abt. Landschaftsökologie: Heterogenität landschaftshaushaltlicher Wasser- und Stoffumsätze in Einzugsgebieten, EcoRegio, 8/2000, 106-113 (2000)
Foken, T; Mangold, A; Hierteis, M; Wichura, B; Rebmann, C: Characterization of the heterogeneity of the terrain by normalized turbulence characteristics, Proc. 13th Symposium on Boundary Layer and Turbulence, 10 - 15 Jan. 1999, Dallas, 26-27 (1999)
Klemm, O; Ziomas, IC; Balis, D; Suppan, P; Slemr, J; Romero, R; Vyras, LG: A summer air-pollution study in Athens, Greece, Atmospheric Environment, 32, 2071-2087 (1998)
Klemm, O; Lange, H: Trends in Air Pollutant Concentrations at a Rural Site in Central Europe. 6th FECS Conference on Chemistry and the Environment, Atmospheric Chemistry and Air Pollution, Environmental Science & Pollution Research, 5, 173 (1998), doi:10.1007/BF02986409 -- Details
Schumann, U; Schlager, H; Arnold, F; Baumann, R; Haschberger, P; Klemm, O: Dilution of aircraft exhaust plumes at cruise altitudes, Atmospheric Environment, 32, 3097-3103 (1998) -- Details
Wrzesinsky, T; Klemm, O; Ostertag-Henning, Ch; Ilgen, G: Organo-Metallic Compounds in Central European Fog, Proc. 1st International Conference on Fog and Fog Collection, Vancouver, Canada (July 1998), 61-64 (1998) -- Details
Klemm, O; Stockwell, WR; Schlager, H; Ziereis, H: Measurements of Nitrogen Oxides from Aircraft in the Northeast Atlantic Flight Corridor, Journal of Geophysical Research D, 103/31, 217-229 (1998) -- Details

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