Image:Ngrip-epica-do18.png

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delta-O-18 from the NGRIP (black) and EPICA (blue) ice cores.

delta-O-18 is a temperature proxy. Higher values are warmer. The left hand side shows the current interglacial. The right hand side is the previous Eemian interglacial which is incomplete in the NGRIP data. During the glacial period the NGRIP core shows clear signs of Dansgaard-Oeschger events which are muted in the EPICA core.

By William M. Connolley.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. Subject to disclaimers.

[edit] Data

NGRIP data is from http://www.glaciology.gfy.ku.dk/data/NGRIP_d18O_50yrs.txt which is the same as the supplementary Data to NGRIP Members, Nature 431, 147 - 151 (09 September 2004); doi:10.1038/nature02805. THe timescale is the ss09sea timescale in years BP 2000.