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Image: Epica-vostok-grip-140kyr

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Description: From the Vostok and EPICA (Antarctica) and NGRIP (Greenland) ice cores: d-o-18, last 140kyr. d-O-18 is a proxy for temperature: more negative is colder; the period from 20 to 10 kyr shows the rise in temperature at the end of the last ice age. Note the Dansgaard-Oeschger events visible in the NGRIP core but barely, if at all, in the Antarctic cores. The period around 120 kyr is the previous interglacial; before that (140 kyr) is the previous glacial. Horizontal axis: years before present (before 1950?). Vertical axis: delta-O-18. See en:Image:Epica-vostok-grip-ngrip-o18.png for inclusion of both GRIP and NGRIP data. Note that the image is mislabelled/misnamed, the red graph shows NGRIP, not GRIP data (the red graph in this image corresponds to the green graph in File:Epica-vostok-grip-ngrip-o18.png).
Title: Epica-vostok-grip-140kyr
Credit: Updated version of en:Image:Epica-vostok-40kyr.png including GRIP. Matlab plot of the following source data: NGRIP: North Greenland Ice Core Project Oxygen Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2004-059. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/isotopes/ngrip-d18o-50yr.txt (ss09sea timescale) EPICA: Jouzel, J., et al. 2004. EPICA Dome C Ice Cores Deuterium Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2004-038. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc_dd.txt (EDC2 timescale) Vostok: Petit, J.R., et al., 2001, Vostok Ice Core Data for 420,000 Years, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2001-076. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt (GT4 timescale)
Author: Vostok Ice Core Data (Petit, J.R., et al., 2001); North Greenland Ice Core Project members (2004); EPICA community members (2004); this image file: William M. Connolley (2005).
Usage Terms: Creative Commons Attribution-Share Alike 3.0 truetrue
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes

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