Dataset Information
Taylor Glacier CO2 Isotope Data 74-59 kyr
Data DOI:
Cite as
Menking, J., Barker, S., Bauska, T., Brook, E. J., Buffen, A., Dyonisius, M., et al. (2022) "Taylor Glacier CO2 Isotope Data 74-59 kyr" U.S. Antarctic Program (USAP) Data Center. doi:
AMD - DIF Record(s)
High-precision carbon isotope data (d13C-CO2) show atmospheric CO2 during Marine Isotope Stage 4 (MIS 4, ~70.5-59 ka) was controlled by a succession of millennial-scale processes. Enriched d13C-CO2 during peak glaciation suggests increased ocean carbon storage. Variations in d13C-CO2 in early MIS4 suggest multiple processes were active during CO2 drawdown, potentially including decreased land carbon and decreased Southern Ocean air-sea gas exchange superposed on increased ocean carbon storage. CO2 remained low during MIS 4 while d13C-CO2 fluctuations suggest changes in Southern Ocean and North Atlantic air-sea gas exchange. A 7 ppm increase in CO2 at the onset of Dansgaard-Oeschger event 19 (72.1 ka) and a 22 ppm increase in CO2 during late MIS 4 (Heinrich Stadial 6, ~63.5-60 ka) involved additions of isotopically light carbon to the atmosphere. The terrestrial biosphere and Southern Ocean air-sea gas exchange are possible sources, with the latter event also involving decreased ocean carbon storage.
Date Created:
USAP-DC (current)
Spatial Extent(s)
West: 161, East: 162, South: -77.8, North: -77.7
  1. Menking, J.A., Shackleton, S.A., Bauska, T.K., Buffen, A., Brook, E.J., Barker, S., Severinghaus, J.P., Dyonisius, M.N., Petrenko, V.V., 2022, Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4, Nature Communications, accepted.
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