Arctic mercury depletion events at two elevations as observed at the Zeppelin Station and Dirigibile Italia, Ny-Ålesund, spring 2002 T. Berg, J. Sommar, Wängberg, K. Gardfeldt, J. Munthe et B. Schroeder J. Phys. IV France, 107 (2003) 151-154 DOI: 10.1051/jp4:20030265