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www.clim-past-discuss.net/6/1733/2010/
doi:10.5194/cpd-6-1733-2010
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TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica
1Laboratoire de Glaciologie et de Géophysique de l'Environnement, CNRS-Universit� de Grenoble 1, UMR 5183, 38402 Saint Martin d'Hères cédex, 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, Sidlerstr. 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 cédex, 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, 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, and that 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 in 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.
Discussion Paper (PDF, 1931 KB) Interactive Discussion (Closed, 5 Comments) Final Revised Paper (CP)
Notice on Discussion StatusCitation: Buiron, D., Chappellaz, J., Stenni, B., Frezzotti, M., Baumgartner, M., Capron, E., Landais, A., Lemieux-Dudon, B., Masson-Delmotte, V., Montagnat, M., Parrenin, F., and Schilt, A.: TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica, Clim. Past Discuss., 6, 1733-1776, doi:10.5194/cpd-6-1733-2010, 2010. Bibtex EndNote Reference Manager XML
