Antarctic Ice Cores Revised 800KYr CO2 Data Bereiter, B.; Eggleston, S.; Schmitt, J.; Nehrbass-Ahles, C.; Stocker, T.F.; Fischer, H.; Kipfstuhl, S.; Chappellaz, J.A. Bereiter, B. Eggleston, S. Schmitt, J. Nehrbass-Ahles, C. Stocker, T.F. Fischer, H. Kipfstuhl, S. Chappellaz, J.A. earth science/paleoclimate/ice cores (notes,null,null,null,null,ice cores,null,null,C,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,one standard deviation,parts per million,null,climate forcing|ice cores,composited|corrected,null,N,null) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,AICC2012) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,EDML1 Sz4) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,corrected,null,N,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,two standard deviations lower bound,parts per million,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,composited|corrected,null,N,null) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,TALDICE-1a) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,EDC3) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,one standard deviation,parts per million,null,climate forcing|ice cores,corrected,null,N,null) earth science/paleoclimate/ice cores (gas age,null,unspecified margin of error,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,null,null,N,correcting factor) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,Ahn2008) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,two standard deviations upper bound,parts per million,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice core (Talos Dome TALDICE>LATITUDE -72.8166>LONGITUDE 159.1833) (WAIS Divide WDC06A>LATITUDE -79.4676>LONGITUDE -112.0865) (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) (Vostok>LATITUDE -78.47>LONGITUDE 106.8) (Siple Dome>LATITUDE -81.65>LONGITUDE -148.82) (EPICA Dronning Maud Land>LATITUDE -75>LONGITUDE .07) (Law Dome>LATITUDE -66.73>LONGITUDE 112.83) The European Project for Ice Coring in Antarctica Dome ice core from Dome C (EDC) has allowed for the reconstruction of atmospheric CO2 concentrations for the last 800,000 years. Here we revisit the oldest part of the EDC CO2 record using different air extraction methods and sections of the core. For our established cracker system, we found an analytical artifact, which increases over the deepest 200 m and reaches 10.1 +/- 2.4 ppm in the oldest/deepest part. The governing mechanism is not yet fully understood, but it is related to insufficient gas extraction in combination with ice relaxation during storage and ice structure. The corrected record presented here resolves partly - but not completely - the issue with a different correlation between CO2 and Antarctic temperatures found in this oldest part of the records. In addition, we provide here an update of 800,000 years atmospheric CO2 history including recent studies covering the last glacial cycle. STUDY NOTES: Revised EPICA Dome C and Antarctic composite ice core atmospheric CO2 data. This new version of CO2 composite replaces the old version of Luthi et al. (2008), which contains the analytical bias described in Bereiter et al. 2015 and lower quality data in other sections. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bereiter, B. Investigator : Eggleston, S. Investigator : Schmitt, J. Investigator : Nehrbass-Ahles, C. Investigator : Stocker, T.F. Investigator : Fischer, H. Investigator : Kipfstuhl, S. Investigator : Chappellaz, J.A. 2015-02-04 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17975 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2domec.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2byrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2wais.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2lawsp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2taylor.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2law.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2siple.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2talos.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2domec.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2byrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2wais.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2lawsp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2taylor.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2law.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2siple.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2talos.txt English https://www.ncdc.noaa.gov/paleo/study/17975 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2domec.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2byrd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2wais.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2lawsp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2taylor.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2law.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2siple.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2talos.txt Bernhard Bereiter, Sarah Eggleston, Jochen Schmitt, Christoph Nehrbass-Ahles, Thomas F. Stocker, Hubertus Fischer, Sepp Kipfstuhl and Jerome Chappellaz2015Revision of the EPICA Dome C CO2 record from 800 to 600 kyr before presentGeophysical Research Letters10.1002/2014GL061957http://onlinelibrary.wiley.com/doi/10.1002/2014GL061957/abstract Dieter Lüthi, Martine Le Floch, Bernhard Bereiter, Thomas Blunier, Jean-Marc Barnola, Urs Siegenthaler, Dominique Raynaud, Jean Jouzel, Hubertus Fischer, Kenji Kawamura, and Thomas F. Stocker2008High-resolution carbon dioxide concentration record 650,000-800,000 years before presentNature453379-38210.1038/nature06949http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html START YEAR: 805668 cal yr BP * END YEAR: -51 cal yr BP -148.82 -81.65 159.1833 -66.73