Articles | Volume 7, issue 1
Clim. Past, 7, 1–16, 2011
Clim. Past, 7, 1–16, 2011

Research article 10 Jan 2011

Research article | 10 Jan 2011

TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica

D. Buiron1, J. Chappellaz1, B. Stenni2, M. Frezzotti3, M. Baumgartner4, E. Capron5, A. Landais5, B. Lemieux-Dudon6, V. Masson-Delmotte5, M. Montagnat1, F. Parrenin1, and A. Schilt7 D. Buiron et al.
  • 1Laboratoire de Glaciologie et Géophysique de l'Environnement (UMR 5183, CNRS-Université Joseph Fourier – Grenoble), , 38402 Saint Martin d'Hères cedex, France
  • 2Department of Geosciences, University of Trieste, 34127 Trieste, Italy
  • 3ENEA, CR Casaccia, 00123, Roma, Italy
  • 4Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
  • 5Laboratoire des Sciences du Climat et de l'Environnement (IPSL/CEA-CNRS-UVSQ UMR 1572), CEA Saclay, 91191 Gif-sur-Yvette cedex, France
  • 6INRIA- Laboratoire Jean Kuntzmann B.P. 53 38041 Grenoble cedex 9 France
  • 7Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland

Abstract. A new deep ice core drilling program, TALDICE, has been successfully handled by a European team at Talos Dome, in the Ross Sea sector of East Antarctica, down to 1620 m depth. Using stratigraphic markers and a new inverse method, we produce the first official chronology of the ice core, called TALDICE-1. We show that it notably improves an a priori chronology resulting from a one-dimensional ice flow model. It is in agreement with a posteriori controls of the resulting accumulation rate and thinning function along the core. An absolute uncertainty of only 300 yr is obtained over the course of the last deglaciation. This uncertainty remains lower than 600 yr over Marine Isotope Stage 3, back to 50 kyr BP. The phasing of the TALDICE ice core climate record with respect to the central East Antarctic plateau and Greenland records can thus be determined with a precision allowing for a discussion of the mechanisms at work at sub-millennial time scales.