Articles | Volume 7, issue 2
Clim. Past, 7, 437–450, 2011
https://doi.org/10.5194/cp-7-437-2011
Clim. Past, 7, 437–450, 2011
https://doi.org/10.5194/cp-7-437-2011

Research article 29 Apr 2011

Research article | 29 Apr 2011

Links between MIS 11 millennial to sub-millennial climate variability and long term trends as revealed by new high resolution EPICA Dome C deuterium data – A comparison with the Holocene

K. Pol1, M. Debret2, V. Masson-Delmotte1, E. Capron1, O. Cattani1, G. Dreyfus1,3, S. Falourd1, S. Johnsen4, J. Jouzel1, A. Landais1, B. Minster1, and B. Stenni5 K. Pol et al.
  • 1Laboratoire des Sciences du Climat et de l'Environnement, IPSL, CEA CNRS UVSQ, UMR 8212, CEA Saclay, L'Orme-des-Merisiers, 91191 Gif-Sur-Yvette Cedex, France
  • 2Laboratoire De Morphodynamique Continentale et Côtière – UMR CNRS 6143, Bât IRESE A, Département de Géologie, Université de Rouen, 76821 Mont Saint Aignan Cedex, France
  • 3Department of Geosciences, Princeton University, Princeton, NJ, USA
  • 4Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
  • 5Università di Trieste, Dipartimento di Scienze Geologiche, Ambientali e Marine, Via E. Weiss 2, 34127 Trieste, Italy

Abstract. We expand here the description of the Antarctic temperature variability during the long interglacial period occurring ~400 thousand years before the present (Marine Isotopic Stage, MIS 11). Our study is based on new detailed deuterium measurements conducted on the EPICA Dome C ice core, Antarctica, with a ~50 year temporal resolution. Despite an ice diffusion of a length reaching ~8 cm at MIS 11 depth, the data allow us to highlight a variability at multi-centennial scale for MIS 11, as it has already been observed for the Holocene period (MIS 1). The differences between MIS 1 and MIS 11 are analysed regarding the links between multi-millennial trends and sub-millennial variability. The EPICA Dome C deuterium record shows an increased variability and the onset of millennial to sub-millennial periodicities at the beginning of the final cooling phase of MIS 11. Our findings are robust with respect to sensitivity tests on the somewhat uncertain MIS 11 duration.

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