Atmos. Chem. Phys. Discuss., 8, 14347-14369, 2008
www.atmos-chem-phys-discuss.net/8/14347/2008/
doi:10.5194/acpd-8-14347-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5 (winter 2006)
E. Starokozhev1, E. Fries2, A. Cycura3, and W. Püttmann1
1Institute of Atmospheric and Environmental Sciences, Dept. of Analytical Environmental Chemistry, J. W. Goethe-University Frankfurt/Main, Germany
2Institute of Environmental Systems Research, University Osnabrück, Germany
3Environment Monitoring Center, Orenburg State University, Russia

Abstract. Volatile organic compounds (VOCs) were analyzed in air and snow samples at the Jungfraujoch high alpine research station in Switzerland as part of CLACE 5 (CLoud and Aerosol Characterization Experiment) during February/March 2006. The fluxes of individual compounds in ambient air were calculated from gas phase concentrations and wind speed. The highest flux values were observed for the aromatic hydrocarbons benzene (14.3 μg m−2s−1), 1,3,5-trimethylbenzene (5.27 μg m−2s−1), toluene (4.40 μg m−2s−1), and the aliphatic hydrocarbons i-butane (7.87 μg m−2s−1), i-pentane (3.61 μg m−2s−1) and n-butane (3.23 μg m−2s−1). The fluxes were used to calculate the efficiency of removal of VOCs by snow, and the effect of temperature on removal efficiency. The removal efficiency was calculated at – 24°C (−13.7°C) and ranged from 37% (35%) for o-xylene to 93% (63%) for i-pentane. The distribution coefficients of VOCs between the air and snow phases were derived from published poly-parameter linear free energy relationship (pp-LFER) data, and compared with distribution coefficients obtained from the simultaneous measurements of VOC concentrations in air and snow at Jungfraujoch. The coefficients calculated from pp-LFER exceeded those values measured in the present study, which indicates more efficient snow scavenging of the VOCs investigated than suggested by theoretical predictions.

Citation: Starokozhev, E., Fries, E., Cycura, A., and Püttmann, W.: Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5 (winter 2006), Atmos. Chem. Phys. Discuss., 8, 14347-14369, doi:10.5194/acpd-8-14347-2008, 2008.
 
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