Marine Isotope Stage (MIS) 8 millennial variability stratigraphically identical to MIS 3

Mark Siddall (1) , Thomas F. Stocker (1) , Thomas Blunier (1) , Renato Spahni (1) , Jakob Schwander (1) , Jean-Marc Barnola (2) , Jérôme Chappellaz (2)

1 CEP - Climate and Environmental Physics [Bern]
2 LGGE - Laboratoire de glaciologie et géophysique de l'environnement

The Marine Isotope Stage (MIS) 3 stratigraphy is highly robust and was reproduced during another period: MIS 8.6 global ice volume was similar during MIS 8.6 to MIS 3 (60 to 90 m sea level equivalent), but the Milankovitch insolation forcing was different, implying that Earth's predisposition to millennial internal variability is controlled by the configuration of the major ice sheets. The involvement of additional factors cannot be ruled out but by identifying several such periods using new deep ice cores from Dome Concordia and Dome Fuji (Antarctica) as well as the marine record we may isolate the factors predisposing Earth to these highly significant modes of climate variability.

Domains: Sciences of the Universe [physics]; Earth Sciences; Glaciology

Mark Siddall, Thomas F. Stocker, Thomas Blunier, Renato Spahni, Jakob Schwander, et al.. Marine Isotope Stage (MIS) 8 millennial variability stratigraphically identical to MIS 3. Paleoceanography, 2007, 22 (PA1208), 1 à 4 p. ⟨10.1029/2006PA001345⟩. ⟨insu-00377274⟩