EPICA Dome C Ice Core Terminations I and II Air Isotopes and CO2 Data Landais, A.; Dreyfus, G.; Capron, E.; Jouzel, J.; Masson-Delmotte, V.; Roche, D.M.; Prié, F.; Caillon, N.; Chappellaz, J.A.; Leuenberger, M.; Lourantou, A.; Parrenin, F.; Raynaud, D.; Teste, G. Landais, A. Dreyfus, G. Capron, E. Jouzel, J. Masson-Delmotte, V. Roche, D.M. Prié, F. Caillon, N. Chappellaz, J.A. Leuenberger, M. Lourantou, A. Parrenin, F. Raynaud, D. Teste, G. Last Interglacial earth science/paleoclimate/ice cores (delta 15N,nitrogen gas,null,per mil AIR,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,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,oxygen gas,null,per mil AIR,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/ice core (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) The largest natural increases in atmospheric CO2 concentration as recorded in ice cores occur when the Earth climate abruptly shifts from a glacial to an interglacial state. Open questions remain regarding the processes at play, the sequences of events and their similarities along different glacial-interglacial transitions. Here we provide new combined data of atmospheric CO2 and its carbon isotopic ratio (d13CO2) for the penultimate glacial-interglacial transition (Termination II) from the Antarctic EPICA Dome C ice core. Together with the strongest Antarctic warming, this transition bears the largest CO2 increase (104 ppmv) of the last nine Terminations, ending with an overshoot of 21 ppmv occurring within ~300 y and leading to higher levels than those of the late pre-industrial Holocene. The full CO2 rise is accompanied by an overall decrease of the d13CO2 minimum values, on which three positive excursions are superimposed. Peak-to-peak d13CO2 changes in our record can reach ~1 per mil. The ice core atmospheric d13CO2 appears more depleted by ~0.2 per mil during Termination II compared to Termination I, paralleling a similar carbon isotopic depletion recorded in marine data. During both terminations, most of CO2 and d13CO2 variations are attributed to southern ocean stratification breakdown and decreased efficiency of the biological pump. Compared to Termination I, Termination II ice core data point to different timings of decrease in iron supply and sea-ice extent, suggesting that they could account for distinct patterns of the carbon cycle. STUDY NOTES: This dataset gathers published and new data of d15N, d18Oatm and CO2 from the EPICA Dome C ice core over Terminations I and II. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Landais, A. Investigator : Dreyfus, G. Investigator : Capron, E. Investigator : Jouzel, J. Investigator : Masson-Delmotte, V. Investigator : Roche, D.M. Investigator : Prié, F. Investigator : Caillon, N. Investigator : Chappellaz, J.A. Investigator : Leuenberger, M. Investigator : Lourantou, A. Investigator : Parrenin, F. Investigator : Raynaud, D. Investigator : Teste, G. 2013-09-16 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/15077 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d18oatm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d15n.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d18oatm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d15n.txt English https://www.ncdc.noaa.gov/paleo/study/15077 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d18oatm.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2013d15n.txt Landais, A., Dreyfus, G.B., Capron, E., Jouzel, J., Masson-Delmotte, V., Roche, D.M., Prié, F., Caillon, N., Chappellaz, J., Leuenberger, M., Lourantou, A., Parrenin, F., Raynaud, D., Teste, G.2013Two-phase change in CO2, Antarctic temperature and global climate during Termination IINature Geoscience6121062-106510.1038/ngeo1985http://www.nature.com/ngeo/journal/v6/n12/abs/ngeo1985.html Gabrielle B. Dreyfus, Jean Jouzel, Michael L. Bender, Amaëlle Landais, Valérie Masson-Delmotte, Markus Leuenberger. 2010. Firn processes and d15N: potential for a gas-phase climate proxy. Quaternary Science Reviews, Vol. 29, Issues 1-2, pp. 28-42. DOI: 10.1016/j.quascirev.2009.10.012 Lourantou, A., J. Chappellaz, J.-M. Barnola, V. Masson-Delmotte, and D. Raynaud. 2010. Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation. Quaternary Science Reviews, Vol. 29, Issues 17-18, August 2010, pp. 1983-1992 doi:10.1016/j.quascirev.2010.05.002 G.B. Dreyfus, F. Parrenin, B. Lemieux-Dudon, G. Durand, V. Masson-Delmotte, J. Jouzel, J.-M. Barnola, L. Panno, R. Spahni, A. Tisserand, U. Siegenthaler, and M. Leuenberger. 2007. Anomalous flow below 2700 m in the EPICA Dome C ice core detected using d18O of atmospheric oxygen measurements. Climate of the Past, Vol. 3, Issue 2, pp. 341-353. DOI: 10.5194/cp-3-341-2007 START YEAR: 153200 cal yr BP * END YEAR: 1380 cal yr BP 123.4 -75.1 123.4 -75.1