Orbital and Millennial Antarctic Climate Variability over the Past

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; East Antarctica; Dronning Maud Land; Antarc*; Antarctica; Dansgaard-Oeschger events; EPICA; ice core
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.988.3642; http://science.sciencemag.org/content/sci/317/5839/793.full.pdf

Ice Coring in Antarctica Dome C ice core, extending this climate record back to marine isotope stage 20.2, ~800,000 years ago. Experiments performed with an atmospheric general circulation model including water isotopes support its temperature interpretation. We assessed the general correspondence between Dansgaard-Oeschger events and their smoothed Antarctic counterparts for this Dome C record, which reveals the presence of such features with similar amplitudes during previous glacial periods. We suggest that the interplay between obliquity and precession accounts for the variable intensity of interglacial periods in ice core records. The European Project for Ice Coring inAntarctica (EPICA) has provided twodeep ice cores in East Antarctica, one (EDC) at Dome C (1), on which we focus here, and one (EDML) in the Dronning Maud Land area (2). The Dome C drilling [fig. S1 and supporting online material (SOM) text] was stopped at a depth of 3260 m, about 15 m above the bedrock. A preliminary low-resolution dD