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

1. (red) Vostok data: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt
2. (orange) EPICA DomeC data: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc_dd.txt
3. (purple) GRIP data: http://www.glaciology.gfy.ku.dk/data/grip-ss09sea-cl-50yr.stp^{[dead link]}
4. (pale blue) NGRIP data:http://www.glaciology.gfy.ku.dk/data/NGRIP_d18O_50yrs.txt archive copy at the Wayback Machine

• 
  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.

• 2006-02-05 08:19 Leland McInnes 1250×875× (181801 bytes) 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 event]]s in the Greenland ice c