IEDA
Dataset Information
Taylor Glacier CO2 Isotope Data 74-59 kyr
Data DOI:
https://doi.org/10.15784/601600
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: https://doi.org/10.15784/601600.
AMD - DIF Record(s)
Abstract
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:
2022-08-23
Repository:
USAP-DC (current)
Spatial Extent(s)
West: 161, East: 162, South: -77.8, North: -77.7
Version:
1
References
  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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README_601600.txt
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Menking_Taylor_Glacier_CO2_isotope_74_59_kyr.xlsx

MD5 Checksum: 5c00009c8f998dddb14cc16d5a0680ef File Type: Microsoft Excel (OpenXML)

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