Image:Grip-ngrip-do18-closeup.png

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[edit] Description

GRIP and NGRIP ice core delta-O-18 data; closeup between 30kyr and 50kyr BP. Note that the GRIP data is plotted on its native timescale; the NGRIP timescale has been shifted linearly so that the jumps at 35.5 and 44.5 kyr coincide between the cores. The offset in delta-O-18 between the cores is real.

The major oscillations are Dansgaard-Oeschger events; their reproducibility between separated cores shows that they are real climate events rather than core artifacts.

[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) GRIP data: http://www.glaciology.gfy.ku.dk/data/grip-ss09sea-cl-50yr.stp
(blue) NGRIP data:http://www.glaciology.gfy.ku.dk/data/NGRIP_d18O_50yrs.txt

[edit] Related Images

Comparison of EPICA, Vostok and GRIP ice core O18 data over 140,000 years

Comparison of EPICA, Vostok, NGRIP and GRIP ice core O18 data over 140,000 years

File history

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	Date/Time	Dimensions	User	Comment
current	23:04, 4 February 2006	1,250×875 (80 KB)	Leland McInnes (Talk \| contribs)	(GRIP and NGRIP ice core delta-O-18 data; closeup between 30kyr and 50kyr BP. Note that the GRIP data is plotted on its native timescale; the NGRIP timescale has been shifted linearly so that the jumps at 35.5 and 44.5 kyr coincide between the core)