Studies on the stability of mercury in fresh snow for the reconstruction of historical Hg concentrations from glacial ice M. Schwikowski, A. Schmitz, L. Tobler, S. Eyrikh, T. Papina et H. W. Gäggeler J. Phys. IV France, 107 (2003) 1441 DOI: 10.1051/jp4:20030580