noaa-icecore-24170 Taylor Glacier, Antarctica 40,000 Year CO2, N2O, and d13CO2 Data Bauska, T.K.; Brook, E.J.; Marcott, S.A.; Baggenstos, D.; Shackleton, S.; Severinghaus, J.; Petrenko, V.V. Taylor Glacier, Antarctica 40,000 Year CO2, N2O, and d13CO2 Data 2018-07-11 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/24170 Investigator T.K. Bauska Investigator E.J. Brook Investigator S.A. Marcott Investigator D. Baggenstos Investigator S. Shackleton Investigator J. Severinghaus Investigator V.V. Petrenko earth science paleoclimate ice cores notes,null,null,null,null,ice cores,null,null,C,Field campaign earth science paleoclimate ice cores delta 13C,carbon dioxide,null,per mil VPDB,null,ice cores,null,isotope ratio mass spectrometry,N,null earth science paleoclimate ice cores notes,null,null,null,null,ice cores,null,null,N,Transect location in meters earth science paleoclimate climate forcing|ice cores carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,null,gas chromatography,N,null earth science paleoclimate ice cores age,null,null,calendar year before present,null,ice cores,null,null,N,Baggenstos et al. 2017 earth science paleoclimate ice cores notes,null,null,null,null,ice cores,null,null,C,Notes including potential outliers earth science paleoclimate ice cores nitrous oxide,bulk atmosphere,null,parts per billion,null,ice cores,null,gas chromatography,N,null earth science paleoclimate ice core atmospheric gas geoscientificInformation carbon cycle 46441 cal yr BP 10919 cal yr BP Complete -77.75 -77.75 161.75 161.75 Continent Antarctica Taylor Glacier>LATITUDE -77.75>LONGITUDE 161.75 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII T.K. Bauska, E.J. Brook, S.A. Marcott, D. Baggenstos, S. Shackleton, J.P. Severinghaus, V.V. Petrenko 2018 Geophysical Research Letters 10.1029/2018GL077881 https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL077881 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. 2016 Proceedings of the National Academy of Sciences 113 13 3465-3470 10.1073/pnas.1513868113 http://www.pnas.org/content/113/13/3465

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: Greenhouse gas (CO2, N2O) and carbon isotope (d13CO2) data from the Taylor Glacier ice core for 46,000 - 11,000 years before present

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/taylor/taylor2018d13co2.txt NOAA Template File; Taylor Glacier CO2, N2O, and d13CO2 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11