Articles | Volume 8, issue 3
Clim. Past, 8, 1031–1045, 2012

Special issue: AICC2012: a new ice core chronology

Clim. Past, 8, 1031–1045, 2012

Research article 08 Jun 2012

Research article | 08 Jun 2012

Volcanic synchronisation between the EPICA Dome C and Vostok ice cores (Antarctica) 0–145 kyr BP

F. Parrenin1,2, J.-R. Petit2, V. Masson-Delmotte3, E. Wolff4, I. Basile-Doelsch5, J. Jouzel3, V. Lipenkov6, S. O. Rasmussen7, J. Schwander8, M. Severi9, R. Udisti9, D. Veres2,10, and B. M. Vinther6 F. Parrenin et al.
  • 1Laboratoire Chrono-Environnement, UMR6249, Besançon, France
  • 2Laboratoire de Glaciologie et Géophysique de l'Environnement, UMR5183 – CNRS, Grenoble, France
  • 3Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France
  • 4British Antarctic Survey, Cambridge, UK
  • 5Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Aix-en-Provence, France
  • 6Arctic and Antarctic Research Institute, St Petersburg, Russia
  • 7Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
  • 8Physics Institute, University of Bern, Bern, Switzerland
  • 9Department of Chemistry, University of Florence, Florence, Italy
  • 10Institute of Speleology, Romanian Academy, Cluj-Napoca, Romania

Abstract. This study aims at refining the synchronisation between the EPICA Dome C (EDC) and Vostok ice cores in the time interval 0–145 kyr BP by using the volcanic signatures. 102 common volcanic events were identified by using continuous electrical conductivity (ECM), di-electrical profiling (DEP) and sulfate measurements while trying to minimize the distortion of the glaciological chronologies. This is an update and a continuation of previous works performed over the 0–45 kyr interval that provided 56 tie points to the ice core chronologies (Udisti et al., 2004). This synchronisation will serve to establish Antarctic Ice Core Chronology 2012, the next synchronised Antarctic dating. A change of slope in the EDC-depth/Vostok-depth diagram is probably related to a change of accumulation regime as well as to a change of ice thickness upstream of the Lake Vostok, but we did not invoke any significant temporal change of surface accumulation at EDC relative to Vostok. No significant phase difference is detected between the EDC and Vostok isotopic records, but depth shifts between the Vostok 3G and 5G ice cores prevent from looking at this problem accurately. Three possible candidates for the Toba volcanic super-eruption ~73 kyr ago are suggested in the Vostok and EDC volcanic records. Neither the ECM, DEP nor the sulfate fingerprints for these 3 events are significantly larger than many others in the records.