Taylor Glacier, Antarctica 22-11KYrBP CO2 and d13CO2 Data Bauska, T.K.; Baggenstos, D.; Brook, E.J.; Mix, A.C.; Marcott, S.A.; Petrenko, V.V.; Schaefer, H.; Severinghaus, J.; Lee, J.-E. Bauska, T.K. Baggenstos, D. Brook, E.J. Mix, A.C. Marcott, S.A. Petrenko, V.V. Schaefer, H. Severinghaus, J. Lee, J.-E. earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,distance along transect surface) earth science/paleoclimate/climate forcing|ice cores (carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,null,gas chromatography - flame ionization detection|mechanical dry extraction,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 (delta 13C,carbon dioxide,null,per mil VPDB,null,ice cores,null,dual-inlet isotope ratio mass spectrometry|mechanical dry extraction,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Taylor Glacier>LATITUDE -77.75>LONGITUDE 161.75) An understanding of the mechanisms that control CO2 change during glacial-interglacial cycles remains elusive. Here we help to constrain changing sources with a high-precision, high-resolution deglacial record of the stable isotopic composition of carbon in CO2 (d13C-CO2) in air extracted from ice samples from Taylor Glacier, Antarctica. During the initial rise in atmospheric CO2 from 17.6 to 15.5 ka, these data demarcate a decrease in d13C-CO2, likely due to a weakened oceanic biological pump. From 15.5 to 11.5 ka, the continued atmospheric CO2 rise of 40 ppm is associated with small changes in d13C-CO2, consistent with a nearly equal contribution from a further weakening of the biological pump and rising ocean temperature. These two trends, related to marine sources, are punctuated at 16.3 and 12.9 ka with abrupt, century-scale perturbations in d13C-CO2 that suggest rapid oxidation of organic land carbon or enhanced air-sea gas exchange in the Southern Ocean. Additional century-scale increases in atmospheric CO2 coincident with increases in atmospheric CH4 and Northern Hemisphere temperature at the onset of the Bolling (14.6-14.3 ka) and Holocene (11.6-11.4 ka) intervals are associated with small changes in d13C-CO2, suggesting a combination of sources that included rising surface ocean temperature. STUDY NOTES: CO2 concentration and Stable Isotopic Composition of CO2 from the Taylor Glacier NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bauska, T.K. Investigator : Baggenstos, D. Investigator : Brook, E.J. Investigator : Mix, A.C. Investigator : Marcott, S.A. Investigator : Petrenko, V.V. Investigator : Schaefer, H. Investigator : Severinghaus, J. Investigator : Lee, J.-E. 2016-03-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19765 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/taylor/taylor2016d13co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/taylor/taylor2016d13co2.txt English https://www.ncdc.noaa.gov/paleo/study/19765 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/taylor/taylor2016d13co2.txt Bauska, T.K., Baggenstos, D., Brook, E.J., Mix, A.C., Marcott, S.A, Petrenko, V.V., Schaefer, H., Severinghaus, J.P., and Lee, J.E.2016Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciationProceedings of the National Academy of Sciences113133465-347010.1073/pnas.1513868113http://www.pnas.org/content/113/13/3465 START YEAR: 22330 cal yr BP * END YEAR: 10919 cal yr BP 161.75 -77.75 161.75 -77.75