Antarctic and Greenland Synchronised Deglacial Ice Core Time Scales Lemieux-Dudon, B.; Blayo, E.; Petit, J.-R.; Waelbroeck, C.; Svensson, A.M.; Ritz, C.; Barnola, J.M.; Narcisi, B.; Parrenin, F. Lemieux-Dudon, B. Blayo, E. Petit, J.-R. Waelbroeck, C. Svensson, A.M. Ritz, C. Barnola, J.M. Narcisi, B. Parrenin, F. earth science/paleoclimate/ice cores (ice age,null,unspecified margin of error,calendar year before present,null,ice cores,null,null,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 (gas age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (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) We are hereby presenting a new dating method based on inverse techniques, which aims at calculating consistent gas and ice chronologies for several ice cores. The proposed method yields new dating scenarios simultaneously for several cores by making a compromise between the chronological information brought by glaciological modeling (i.e., ice flow model, firn densification model, accumulation rate model), and by gas and ice stratigraphic constraints. This method enables us to gather widespread chronological information and to use regional or global markers (i.e., methane, volcanic sulfate, Beryllium-10, tephra layers, etc.) to link the core chronologies stratigraphically. Confidence intervals of the new dating scenarios can be calculated thanks to the probabilistic formulation of the new method, which takes into account both modeling and data uncertainties. We apply this method simultaneously to one Greenland (NGRIP) and three Antarctic (EPICA Dome C, EPICA Dronning Maud Land, and Vostok) ice cores, and refine existent chronologies. Our results show that consistent ice and gas chronologies can be derived for depth intervals that are well-constrained by relevant glaciological data. In particular, we propose new and consistent dating of the last deglaciation for Greenland and Antarctic ice and gas records. STUDY NOTES: New synchronised time scales for one Greenland (NGRIP) and 3 Antarctic (EPICA Dome C, EPICA Dronning Maud Land, and Vostok) ice cores. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lemieux-Dudon, B. Investigator : Blayo, E. Investigator : Petit, J.-R. Investigator : Waelbroeck, C. Investigator : Svensson, A.M. Investigator : Ritz, C. Investigator : Barnola, J.M. Investigator : Narcisi, B. Investigator : Parrenin, F. 2011-03-21 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10588 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.xls English https://www.ncdc.noaa.gov/paleo/study/10588 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/lemieux-dudon2010timescales.xls Lemieux-Dudon, B., E. Blayo, J.-R. Petit, C. Waelbroeck, A. Svensson, C. Ritz, J.-M. Barnola, B.M. Narcisi, and F. Parrenin. 2010. Consistent dating for Antarctic and Greenland ice cores. Quaternary Science Reviews, Vol. 29, Issues 1-2, pp. 8-20, Jan. 2010. doi:10.1016/j.quascirev.2009.11.010. START YEAR: 59343 cal yr BP * END YEAR: -55 cal yr BP -42.33 -78.47 123.4 75.1