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A Three-year Study of Nonmethane Hydrocarbons in Surface Air over Saxony (Germany)

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Abstract

Measurements of the nonmethane hydrocarbon (NMHC) mixing ratio over a period of 42 months were carried out for the first time in the air of a research station situated in the former East Germany during the SANA project. Apart from four species, all other species analysed showed a statistically significant downward trend at the 95% significance level. The decrease of the hydrocarbon concentrations was superimposed by seasonal variations. A drop of about 40% of the annual mean values from 1993 to 1995 was observed. This development reflects the dramatic changes in traffic, industry, power economy, and agriculture in Saxony after the reunification of Germany. The remove of two-stroke engined cars is reflected in NMHC mixing ratio changes, as is the removal of obsolete chemical plants. Generally it was not possible to relate causes and effects of a single event, but in some cases major changes in concentrations and NMHC ratios occurred coincidentally with the disappearance of a specific emission source.

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Authors and Affiliations

  1. Institute for Tropospheric Research (IfT) Permoserstr. 15, D-04318, Leizig, Germany

    Thomas Gnauk & Wolfgang Rolle

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  1. Thomas Gnauk
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  2. Wolfgang Rolle
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Gnauk, T., Rolle, W. A Three-year Study of Nonmethane Hydrocarbons in Surface Air over Saxony (Germany). Journal of Atmospheric Chemistry 30, 371–395 (1998). https://doi.org/10.1023/A:1006001020538

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  • DOI: https://doi.org/10.1023/A:1006001020538

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