1Institut de Recherche pour le Développement (IRD), UMS222 OSUG, France
2Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), UMR5183, St Martin d'Hères, France
3Division of Climate and Environmental Physics, University of Berne, Switzerland
4HZM-Institute for Groundwater Ecology, Neuherberg, Germany
5Paul Scherrer Institute (PSI), Villigen, Switzerland
6Dirección de Programas Antárticos, Instituto de la Patagonia, Universidad de Magallanes, Punta Arenas, Chile
7Institut de Recherche pour le Développement (IRD), UMR012 LTHE, Ecuador
Abstract. The comparison of two shallow ice cores recovered in 1999 and 2000 from the same place on the Chimborazo summit glacier revealed the influence of the coincident Tungurahua volcanic eruption on their stable isotope and chemical records. The surface snow melting and water percolation induced from the ash deposition caused a preferential elution and re-localization of certain ionic species, while the stable isotope records were not affected. Additionally, the comparison of the ionic amount and some selected ion ratios preserved along the ice core column reports under which processes the chemical species are introduced in the snow pack, as snow flake condensation nuclei, by atmospheric scavenging or by dry deposition. This preliminary study is essential for the interpretation of the deep Chimborazo ice core, or for other sites where surrounding volcanic activity influences the glaciochemical records.