AICC2012 800KYr Antarctic Ice Core Chronology Bazin, L.; Landais, A.; Lemieux-Dudon, B.; Toyé Mahamadou Kele, H.; Veres, D.; Parrenin, F.; Martinerie, P.; Ritz, C.; Capron, E.; Lipenkov, V.; Loutre, M.F.; Raynaud, D.; Vinther, B.M.; Svensson, A.M.; Rasmussen, S.O.; Severi, M.; Blunier, T.; Leuenberger, M.; Fischer, H.; Masson-Delmotte, V.; Chappellaz, J.A.; Wolff, E.W. Bazin, L. Landais, A. Lemieux-Dudon, B. Toyé Mahamadou Kele, H. Veres, D. Parrenin, F. Martinerie, P. Ritz, C. Capron, E. Lipenkov, V. Loutre, M.F. Raynaud, D. Vinther, B.M. Svensson, A.M. Rasmussen, S.O. Severi, M. Blunier, T. Leuenberger, M. Fischer, H. Masson-Delmotte, V. Chappellaz, J.A. Wolff, E.W. earth science/paleoclimate/ice cores (gas age,null,one standard deviation,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,ice equivalent) earth science/paleoclimate/ice cores (thinning function,bulk ice,null,dimensionless,null,ice cores,null,numerical simulation,N,null) earth science/paleoclimate/ice cores (ice age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (ice age,null,one standard deviation,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (lock-in depth,bulk ice,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (Talos Dome TALDICE>LATITUDE -72.8166>LONGITUDE 159.1833) (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) (Vostok>LATITUDE -78.47>LONGITUDE 106.8) (EPICA Dronning Maud Land>LATITUDE -75>LONGITUDE .07) (NGRIP>LATITUDE 75.1>LONGITUDE -42.33) An accurate and coherent chronological framework is essential for the interpretation of climatic and environmental records obtained from deep polar ice cores. Until now, one common ice core age scale had been developed based on an inverse dating method (Datice), combining glaciological modelling with absolute and stratigraphic markers between 4 ice cores covering the last 50 ka (thousands of years before present) (Lemieux-Dudon et al., 2010). In this paper, together with the companion paper of Veres et al. (2013), we present an extension of this work back to 800 ka for the NGRIP, TALDICE, EDML, Vostok and EDC ice cores using an improved version of the Datice tool. The AICC2012 (Antarctic Ice Core Chronology 2012) chronology includes numerous new gas and ice stratigraphic links as well as improved evaluation of background and associated variance scenarios. This paper concentrates on the long timescales between 120-800 ka. In this framework, new measurements of d18Oatm over Marine Isotope Stage (MIS) 11-12 on EDC and a complete d18Oatm record of the TALDICE ice cores permit us to derive additional orbital gas age constraints. The coherency of the different orbitally deduced ages (from d18Oatm, dO2/N2 and air content) has been verified before implementation in AICC2012. The new chronology is now independent of other archives and shows only small differences, most of the time within the original uncertainty range calculated by Datice, when compared with the previous ice core reference age scale EDC3, the Dome F chronology, or using a comparison between speleothems and methane. For instance, the largest deviation between AICC2012 and EDC3 (5.4 ka) is obtained around MIS 12. Despite significant modifications of the chronological constraints around MIS 5, now independent of speleothem records in AICC2012, the date of Termination II is very close to the EDC3 one. STUDY NOTES: The AICC2012 chronology is a common and precise chronology for Vostok, EDC, EDML, TALDICE and NGRIP ice core. For each core data include Depth, ice age, gas age (and their uncertainties), the accumulation rate, the thinning function, and the Lock-in depth in ice equivalent (LIDIE). The new age scale is tuned to GICC05 over the last 60 ka. The "-1" here is equivalent to "NaN" NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bazin, L. Investigator : Landais, A. Investigator : Lemieux-Dudon, B. Investigator : Toyé Mahamadou Kele, H. Investigator : Veres, D. Investigator : Parrenin, F. Investigator : Martinerie, P. Investigator : Ritz, C. Investigator : Capron, E. Investigator : Lipenkov, V. Investigator : Loutre, M.F. Investigator : Raynaud, D. Investigator : Vinther, B.M. Investigator : Svensson, A.M. Investigator : Rasmussen, S.O. Investigator : Severi, M. Investigator : Blunier, T. Investigator : Leuenberger, M. Investigator : Fischer, H. Investigator : Masson-Delmotte, V. Investigator : Chappellaz, J.A. Investigator : Wolff, E.W. 2013-09-16 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/15076 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012ngrip.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012icecore-data.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012taldice.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012official.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012ngrip.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012icecore-data.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012taldice.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012official.xls English https://www.ncdc.noaa.gov/paleo/study/15076 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012ngrip.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edml.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012edc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012icecore-data.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012taldice.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012vostok.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/aicc2012official.xls L. Bazin, A. Landais, B. Lemieux-Dudon, H. Toyé Mahamadou Kele, D. Veres, F. Parrenin, P. Martinerie, C. Ritz, E. Capron, V. Lipenkov, M.-F. Loutre, D. Raynaud, B. Vinther, A. Svensson, S.O. Rasmussen, M. Severi, T. Blunier, M. Leuenberger, H. Fischer, V. Masson-Delmotte, J. Chappellaz, and E.Wolff. 2013. An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka. Climate of the Past, Vol. 9, Issue 4, pp. 1715-1731. DOI: 10.5194/cp-9-1715-2013 D. Veres, L. Bazin, A. Landais, H. Toyé Mahamadou Kele, B. Lemieux-Dudon, F. Parrenin, P. Martinerie, E. Blayo, T. Blunier, E. Capron, J. Chappellaz, S.O. Rasmussen, M. Severi, A. Svensson, B. Vinther, and E.W. Wolff. 2013. The Antarctic ice core chronology (AICC2012): an optimized multi-parameter and multi-site dating approach for the last 120 thousand years. Climate of the Past, Vol. 9, Issue 4, pp. 1733-1748. DOI: 10.5194/cp-9-1733-2013 START YEAR: 807941 cal yr BP * END YEAR: -55 cal yr BP -42.33 -78.47 159.1833 75.1