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Common millennial-scale variability of Antarctic and Southern Ocean temperatures during the past 5000 years reconstructed from the EPICA Dome C ice core

Laboratoire des Sciences du Climat et de l'Environnement, IPSL/CEA-CNRS, 91 191 Gif-sur-Yvette cédex, France; masson{at}lsce.saclay.cea.fr

B. Stenni

Department of Geological, Environmental and Marine Sciences, University of Trieste, Trieste, Italy

J. Jouzel

Laboratoire des Sciences du Climat et de l'Environnement, IPSL/CEA-CNRS, 91 191 Gif-sur-Yvette cédex, France

Measurements of the two water stable isotopes (dD and d¹⁸O) along EPICA (European Project for Ice Coring in Antarctica) Dome C ice core are combined with simple isotopic modelling (distillation models) to reconstruct the variability of both the site temperature (East Antarctica) and the moisture source temperature (nowadays probably the subantarctic Indian Ocean). We discuss the difference between the reconstructed site and source temperature pro" les with respect to the initial isotopic data. We show that (i) the early-Holocene optimum appears" rst in Antarctica and 800 years later in the Southern Ocean, and (ii) during the last 5000 years, the site and source temperatures co-vary at the centennial timescale. An 833-year periodicity is observed only on deuterium and site temperature and therefore probably of local origin.

Key Words: Millennial-scale variability • climatic variations • ice core • EPICA • Southern Ocean • Dome C • isotopic modelling • Climatic Optimum • Holocene • Antarctica

The Holocene, Vol. 14, No. 2, 145-151 (2004)
DOI: 10.1191/0959683604hl697ft


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