EDML-Talos Dome Antarctic Ice Core 38-115KYrBP CO2 Data Bereiter, B.; Lüthi, D.; Siegrist, M.; Schüpbach, S.; Stocker, T.F.; Fischer, H. Bereiter, B. Lüthi, D. Siegrist, M. Schüpbach, S. Stocker, T.F. Fischer, H. Meridional Overturning Circulation (MOC) carbon cycle earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,EDML1_Sc4 gas age) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,one standard deviation,parts per million,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (notes,null,null,null,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,TALDICE-1a gas age) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,averaged,null,N,null) earth science/paleoclimate/ice core (Talos Dome TALDICE>LATITUDE -72.8166>LONGITUDE 159.1833) (EPICA Dronning Maud Land>LATITUDE -75>LONGITUDE .07) Important elements of natural climate variations during the last ice age are abrupt temperature increases over Greenland and related warming and cooling periods over Antarctica. Records from Antarctic ice cores have shown that the global carbon cycle also plays a role in these changes. The available data shows that atmospheric CO2 follows closely temperatures reconstructed from Antarctic ice cores during these variations. Here, we present new high-resolution CO2 data from Antarctic ice cores, which cover the period between 115,000 and 38,000 y before present. Our measurements show that also smaller Antarctic warming events have an imprint in CO2 concentrations. Moreover, they indicate that during Marine Isotope Stage (MIS) 5, the peak of millennial CO2 variations lags the onset of Dansgaard/ Oeschger warmings by 250 +/- 190 y. During MIS 3, this lag increases significantly to 870 +/- 90 y. Considerations of the ocean circulation suggest that the millennial variability associated with the Atlantic Meridional Overturning Circulation (AMOC) undergoes a mode change from MIS 5 to MIS 4 and 3. Ocean carbon inventory estimates imply that during MIS 3 additional carbon is derived from an extended mass of carbon-enriched Antarctic Bottom Water. The absence of such a carbon-enriched water mass in the North Atlantic during MIS 5 can explain the smaller amount of carbon released to the atmosphere after the Antarctic temperature maximum and, hence, the shorter lag. Our new data provides further constraints for transient coupled carbon cycle-climate simulations during the entire last glacial cycle. STUDY NOTES: High-resolution Carbon Dioxide (CO2) data from two Antarctic ice cores, covering the period between 115,000 and 38,000 years before present. EPICA Dronning Maud Land Ice Core: 75°00'S, 00°04'E, 2892 m elevation TALDICE Talos Dome Ice Core: 72°49'S, 159°11'E, 2315 m elevation NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bereiter, B. Investigator : Lüthi, D. Investigator : Siegrist, M. Investigator : Schüpbach, S. Investigator : Stocker, T.F. Investigator : Fischer, H. 2012-06-11 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/12995 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.xls English https://www.ncdc.noaa.gov/paleo/study/12995 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/edml-talos2012co2.xls Bereiter, B., D. Lüthi, M. Siegrist, S. Schüpbach, T.F. Stocker, and H. Fischer. 2012. Mode change of millennial CO2 variability during the last glacial cycle associated with a bipolar marine carbon seesaw. Proceedings of the National Academy of Sciences, published ahead of print June 6, 2012, doi:10.1073/pnas.1204069109 START YEAR: 114193 cal yr BP * END YEAR: 34167 cal yr BP .07 -75 159.1833 -72.8166