Year: 2007
Type: article
Abstract: . The EPICA (European Project for Ice Coring in Antarctica) Dome C drilling in East Antarctica has now been completed to a depth of 3260 m, at only a few meters above bedrock. Here we present the new EDC3 chronology, which is based on the use of 1) a snow accumulation and mechanical flow model, and 2) a set of independent age markers along the core. These are obtained by pattern matching of recorded parameters to either absolutely dated paleoclimatic records, or to insolation variations. We show that this new time scale is in excellent agreement with the Dome Fuji and Vostok ice core time scales back to 100 kyr within 1 kyr. Discrepancies larger than 3 kyr arise during MIS 5.4, 5.5 and 6, which points to anomalies in either snow accumulation or mechanical flow during these time periods. We estimate that EDC3 gives accurate event durations within 20% (2σ) back to MIS11 and accurate absolute ages with a maximum uncertainty of 6 kyr back to 800 kyr.
Source: Climate of the past
Authors: F. Parrenin, J.-M. Barnola, J. Beer, T. Blunier, E. Castellano, J. Chappellaz, G. Dreyfus, H. Fischer, S. Fujita, J. Jouzel, K. Kawamura, B. Lemieux-Dudon, L. Loulergue, V. Masson-Delmotte, B. Narcisi, J.-R. Petit, G. Raisbeck, D. Raynaud, U. Ruth, J. Schwander, M. Severi, R. Spahni, J. P. Steffensen, A. Svensson, R. Udisti, C. Waelbroeck, E. Wolff
Institutions: Centre National de la Recherche Scientifique, Université Joseph Fourier, Laboratoire de Glaciologie et Géophysique de l’Environnement, Swiss Federal Institute of Aquatic Science and Technology, University of Bern, University of Florence, Université de Versailles Saint-Quentin-en-Yvelines, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Laboratoire des Sciences du Climat et de l'Environnement, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, National Institute of Polar Research, Research Organization of Information and Systems, Tohoku University, National Agency for New Technologies, Energy and Sustainable Economic Development, ENEA Casaccia Research Centre, Institut National de Physique Nucléaire et de Physique des Particules, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, University of Copenhagen, British Antarctic Survey
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,725
OpenAlex ID: W2145370723