Title Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5 (winter 2006)
Author Starokozhev, E.; Fries, E.; Cycura, A.; Püttmann, W.
Author Affil Starokozhev, E., Johann Wolfgang Goethe Universität Frankfurt am Main, Institut für Atmospha1.re und Umwelt, Frankfurt am Main, Germany. Other: Universität Osnabrück, Germany; Orenburg State University, Russian Federation
Source Atmospheric Chemistry and Physics, 9(9), p.3197-3207, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2009
Notes In English. Part of special issue no. 132, Cloud, aerosol, ice and snow characterizations within the CLACE experiments at the high alpine research station Jungfraujoch, edited by Weingartner, E., et al., http://www.atmos-chem- phys.net/special_issue132.html; published in Atmospheric Chemistry and Physics Discussions: 25 July http://www.atmos-chem- phys-discuss.net/8/14347/2008/acpd-8-14347- 2008.ht ml; accessed in Apr., 2011. 38 refs. GeoRef Acc. No: 310580
Index Terms air temperature; Alpine landscapes; precipitation (meteorology); distribution; humidity; hydrocarbons; snow; temperature; Alps; Switzerland; air; alpine environment; aromatic hydrocarbons; atmospheric precipitation; background radiation; benzene; Central Europe; CLoud and Aerosol Charactrization Experiment; ethylbenzene; Europe; Jungfrau; organic compounds; partition coefficients; terrestrial environment; toluene; volatile organic compounds; volatiles; winds
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 concentrations and flux values were observed for the aromatic hydrocarbons benzene (14.3 µg.m-2 s-1), 1,3,5- trimethylbenzene (5.27 µg.m-2 s-1), toluene (4.40 µg.m-2 s-1), and the aliphatic hydrocarbons i-butane (7.87 µg.m-2 s-1), i- pentane (3.61 µg.m-2 s-1) and n-butane (3.23 µg.m-2 s-1). The measured concentrations and fluxes were used to calculate the efficiency of removal of VOCs by snow, which is defined as difference between the initial and final concentration/flux values of compounds before and after wet deposition. 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.
URL http://www.atmos-chem-phys.net/9/3197/2009/acp-9-3197-2009.pdf
Publication Type journal article
Record ID 65007021