EPICA Dome C CO2 Data 650 to 390 KYrBP ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: EPICA Dome C CO2 Data 650 to 390 KYrBP LAST UPDATE: 11/2005 (Original receipt by WDC Paleo) CONTRIBUTORS: Urs Siegenthaler, Thomas F. Stocker, Eric Monnin, Dieter LŸthi, Jakob Schwander, Bernhard Stauffer Climate and Environmental Physics, Physics Institute, University of Bern, Switzerland Jean-Marc Barnola, Dominique Raynaud Laboratoire de Glaciologie et GŽophysique de l'Environnement (LGGE, CNRS-UJF), Grenoble, France IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-077 SUGGESTED DATA CITATION: Siegenthaler, U., et al. 2005. EPICA Dome C CO2 Data 650 to 390 KYrBP. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2005-077. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: U. Siegenthaler, T. F. Stocker, E. Monnin, D. LŸthi, J. Schwander, B. Stauffer, D. Raynaud, J.-M. Barnola, H. Fischer, V. Masson-Delmotte, J. Jouzel. 2005. Stable Carbon Cycle-Climate Relationship During the Late Pleistocene. Science, v. 310 , pp. 1313-1317, 25 November 2005. ABSTRACT: A record of atmospheric carbon dioxide (CO2) concentrations measured on the EPICA (European Project for Ice Coring in Antarctica) Dome Concordia ice core extends the Vostok CO2 record back to 650,000 years before the present (yr B.P.). Before 430,000 yr B.P., partial pressure of atmospheric CO2 lies within the range of 260 and 180 parts per million by volume. This range is almost 30% smaller than that of the last four glacial cycles; however, the apparent sensitivity between deuterium and CO2 remains stable throughout the six glacial cycles, suggesting that the relationship between CO2 and Antarctic climate remained rather constant over this interval. GEOGRAPHIC REGION: Antarctica PERIOD OF RECORD: 650 - 390 KYrBP DESCRIPTION: CO2 record from the EPICA Dome C 1999 (EDC99) ice core (Antarctica) covering 390 to 650 kyr BP. EPICA Dome C core location: 75¡06'S, 123¡21'E, 3233 m above sea level New data has been measured in Bern on 1372 samples at 322 depth intervals, including data from 193 samples at 31 depth intervals over termination V. Sample ages range from 413 to 650 kyr BP (EDC2 timescale, EPICA community members 2004). In Grenoble, CO2 concentation has been measured (accuracy 2s = ±3 ppmv) at 31 depth intervals with an age between 391 and 424 kyr BP. The mean CO2 time resolution is 731 years. FUNDING SOURCES: This work is a contribution to the "European Project for Ice Coring in Antarctica" (EPICA), a joint ESF (European Science Foundation)/EC scientific programme, funded by the European Commission and by national contributions from Belgium, Denmark, France, Germany, Italy, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom. We acknowledge long-term financial support by the Swiss NSF, the University of Bern and the Swiss Federal Agency of Energy, and EC Project EPICA-MIS. DATA: 1. EDC CO2 Measurements (Bern): Column 1: EDC99 depth (m) Column 2: EDC2 gas age (years before AD 1950) Column 3: CO2 concentration (parts per million by volume) is a mean value of 4-6 neighboring samples Column 4: sigma mean (parts per million by volume) is sigma mean is one sigma of the mean value (of 4-6 neighboring samples)