Journal
CLIMATE OF THE PAST
Volume 7, Issue 2, Pages 437-450Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/cp-7-437-2011
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Funding
- EU [FP7/2007-2013, 243908]
- national contributions from Belgium
- national contributions from Denmark
- national contributions from France
- national contributions from Germany
- national contributions from Italy
- national contributions from the Netherlands
- national contributions from Norway
- national contributions from Sweden
- national contributions from Switzerland
- national contributions from United Kingdom
- national contributions from Spain
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We expand here the description of the Antarctic temperature variability during the long interglacial period occurring similar to 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 similar to 50 year temporal resolution. Despite an ice diffusion of a length reaching similar to 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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