Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation

Bauska, Thomas K.; Baggenstos, Daniel; Brook, Edward J.; Mix, Alan C.; Marcott, Shaun A.; Petrenko, Vasilii V.; Schaefer, Hinrich; Severinghaus, Jeffrey P.; Lee, James E.

doi:10.1073/pnas.1513868113

Cited by 180Geology and Paleoclimatology ResearchClimate variability and modelsAtmospheric and Environmental Gas Dynamics

Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation

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Bauska, Thomas K., Baggenstos, Daniel, Brook, Edward J., Mix, Alan C., Marcott, Shaun A., Petrenko, Vasilii V., Schaefer, Hinrich, Severinghaus, Jeffrey P. +1 more·2016·Proceedings of the National Academy of Sciences

DOI 10.1073/pnas.1513868113PMC PMC4822573

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Abstract

Significance: Antarctic ice cores provide a precise, well-dated history of increasing atmospheric CO 2 during the last glacial to interglacial transition. However, the mechanisms that drive the increase remain unclear. Here we reconstruct a key indicator of the sources of atmospheric CO 2 by measuring the stable isotopic composition of CO 2 in samples spanning the period from 22,000 to 11,000 years ago from Taylor Glacier, Antarctica. Improvements in precision and resolution allow us to fingerprint CO 2 sources on the centennial scale. The data reveal two intervals of rapid CO 2 rise that are plausibly driven by sources from land carbon (at 16.3 and 12.9 ka) and two others that appear fundamentally different and likely reflect a combination of sources (at 14.6 and 11.5 ka).

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The 14C trough appears slightly earlier than the abrupt rise in atmospheric CO2 at the start of Greenland Interstadial 1 that started around 14.6 cal kBP in the West Antarctic Ice Sheet Divide ice core on its most recent age scale WD2014.
“The 14 C trough appears slightly earlier than the abrupt rise in atmospheric CO2 at the start of Greenland Interstadial 1 that started around 14.6 cal kBP in the highly resolved West Antarctic Ice Sheet Divide ice core on its most recent age scale WD2014 (Marcott et al. 2014; Bauska et al. 2016; Sigl et al. 2016).”
From The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP) (2020) · cites this paper as Bauska et al. 2016
The section on processes controlling atmospheric carbon isotopes reports a rapid CO2 rise in the WAIS Divide record at the onset of the Bølling–Allerød, around 14.6 ka. Our copy does not establish that a 14C trough preceded that rise or identify WD2014 as the age scale; searches for the trough and age scale found no supporting passage. (LLM, conf=0.85)
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The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Reimer, P. J., Austin, W. E. N., Bard, E., Bayliss, A., Blackwell, P. G., Bronk Ramsey, C., Butzin, M., Cheng, H., Edwards, R. L., Friedrich, M., et al. (2020) · Radiocarbon · doi:10.1017/rdc.2020.41 · Cited by 7,900 · see citing works
“The 14 C trough appears slightly earlier than the abrupt rise in atmospheric CO 2 at the start of Greenland Interstadial 1 that started around 14.6 cal kBP in the highly resolved West Antarctic Ice Sheet Divide ice core on its most recent age scale WD2014 (Marcott et al. 2014; Bauska et al. 2016; Sigl et al. 2016).”
BackgroundInfluential
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion
McConnell, J. R., Burke, A., Dunbar, N. W., Köhler, P., Thomas, J. L., Arienzo, M. M., Chellman, N. J., Maselli, O. J., Sigl, M., Adkins, J. F., et al. (2017) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1705595114 · Cited by 135 · see citing works
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Authors: Bauska, T. K., Baggenstos, D., Brook, E. J., Mix, A. C., Marcott, S. A., Petrenko, V. V., Schaefer, H., Severinghaus, J. P., & Lee, J. E.
Affiliations: Oregon State University (US)
Scripps Institution of Oceanography (US)
University of Wisconsin–Madison (US)
University of Rochester (US)
National Institute of Water and Atmospheric Research (NZ)
ORCID: Bauska, Thomas K.
Baggenstos, Daniel
Brook, Edward J.
Mix, Alan C.
Marcott, Shaun A.
Petrenko, Vasilii V.
Schaefer, Hinrich
Severinghaus, Jeffrey P.
Lee, James E.
Venue: Proceedings of the National Academy of Sciences
Publisher: National Academy of Sciences
Published: 2016-03-14
Volume: 113
Issue: 13
Pages: 3465-3470
ISSN: 0027-8424 (ISSN-L)
1091-6490
DOI: 10.1073/pnas.1513868113
PMC: PMC4822573
OpenAlex: W2298919510
Semantic Scholar: c816b43883d7041747754814372959d436186b23
Cited by: 180
References: 48
Citations by year: 2026: 9 · 2025: 12 · 2024: 23 · 2023: 18 · 2022: 27 · 2021: 29 · 2020: 15 · 2019: 18 · 2018: 15 · 2017: 8 · 2016: 5
FWCI: 9.33
Type: journal article
Language: en
Open access: bronze
doi.org
Licence: www.pnas.org/preview_site/misc/userlicense.xhtml (vor, 184 d)
Locations: Proceedings of the National Academy of Sciences (publishedVersion)
PubMed Central (publishedVersion)
PubMed (publishedVersion)
eScholarship (California Digital Library) (submittedVersion)
Northumbria Research Link (Northumbria University) (submittedVersion)
Funders: NSF | GEO | POLAR | Division of Antarctic Sciences (ANT 0838936, ANT 0839031)
Topics: Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
Keywords: atmospheric CO2, carbon isotopes, last deglaciation, glacial-interglacial cycles, organic carbon oxidation, air-sea gas exchange, Southern Ocean, Bølling, Holocene, methane, seawater temperature, carbon source

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Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation

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