J. Phys. IV France 107 (2003) 1353
Interpretation of mercury depletion events observed at Ny-Ålesund, Svalbard during spring 2002Wängberg1, J. Sommar2, T. Berg3, K. Gardfeldt2 and J. Munthe1
1 IVL Swedísh Environmental Research Institute, P.O. Box 47086, 40258 Göteborg, Sweden
2 Department of Chemistry, Gôteborg University, Kemivägen 4, 41296 Göteborg, Sweden
3 Norwegian Institute for Air Research (NILU), P.O. Box 100, 2007 Kjeller, Norway
Mercury in different environmental compartments were measured at the Norwegian Arctic site Ny-Ålesund (78°54 'N, 11°53 'E) during the period April 17 to May 14, 2002. Time-resolved speciated determination of mercury species in the atmosphere (Hg 0(g), Hg (g) and Hg(particle)) and in snow were conducted. One major and two minor mercury depletion events occurred during the campaign. The depletion events were characterised by low concentrations of oxidised gaseous and airbome particulate mercury species. Elevated concentration of mercury in snow was detected during snowfall in conjunction with one mercury depletion episode. The observations have been analysed using meteorological and remote-sensing data. The results suggest that the low Hg 0(g) concentrations observed were due to long range transport of mercury depleted air masses.
© EDP Sciences 2003