Articles | Volume 12, issue 3
Clim. Past, 12, 729–748, 2016
https://doi.org/10.5194/cp-12-729-2016
Clim. Past, 12, 729–748, 2016
https://doi.org/10.5194/cp-12-729-2016
Research article
22 Mar 2016
Research article | 22 Mar 2016

Phase relationships between orbital forcing and the composition of air trapped in Antarctic ice cores

Lucie Bazin et al.

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We present new measurements of δO2⁄N2 and δ18Oatm performed on well-conserved ice from EDC covering MIS5 and between 380 and 800 ka. The combination of the observation of a 100 ka periodicity in the new δO2⁄N2 record with a MIS5 multi-site multi-proxy study has revealed a potential influence of local climatic parameters on δO2⁄N2. Moreover, we propose that the varying delay between d18Oatm and precession for the last 800 ka is affected by the occurrence of ice sheet discharge events.