Image:Ice-core-isotope.png

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[edit] Description

Comparison of temperature proxies for ice cores from Antarctica and Greenland for 140,000 years. Greenland ice cores use delta ¹⁸O, while Antarctic ice cores use delta ²H. Note the Dansgaard-Oeschger events in the Greenland ice core between 20,000 and 110,000 years ago, which barely register (if at all) in the corresponding Antarctic record.

GRIP and NGRIP data is on ss09sea timescale, Vostok uses GT4, and EPICA uses EDC2.

[edit] Copyright

This figure was produced by Leland McInnes using gnuplot and is licensed under the GFDL. All data is from publicly available sources.

I, the creator of this work, hereby grant the permission 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 Sources

(red) Vostok data: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt
(orange) EPICA DomeC data: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc_dd.txt
(purple) GRIP data: http://www.glaciology.gfy.ku.dk/data/grip-ss09sea-cl-50yr.stp
(pale blue) NGRIP data:http://www.glaciology.gfy.ku.dk/data/NGRIP_d18O_50yrs.txt

[edit] Related Images

A similar chart showing unadjusted GRIP data.

Closeup of the GRIP and NGRIP data.

Heinrich events against this data.

Correlation of EPICA delta ²H data with Vostok and EPICA CO₂ data.

File history

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(del) (cur) 08:19, 5 February 2006 . . Leland McInnes (Talk | contribs) . . 1250×875 (181,801 bytes) (Comparison of temperature proxies for ice cores from Antarctica and Greenland for 140,000 years. Greenland ice cores use delta <sup>18</sup>O, while Antarctic ice cores use delta <sup>2</sup>H. Note the Dansgaard-Oeschger events in the Greenland ice c)