Abstract
Precise and detailed measurements have been made of the 13C content of both planktonic and benthic foraminifera in core V 19-30. Using the approach developed by Broecker, a record of atmospheric CO2 concentration during the past 120,000 years has been derived which provides independent confirmation that the CO2 concentration in the glacial-age atmosphere was much lower than it is today.
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Shackleton, N., Hall, M., Line, J. et al. Carbon isotope data in core V19-30 confirm reduced carbon dioxide concentration in the ice age atmosphere. Nature 306, 319–322 (1983). https://doi.org/10.1038/306319a0
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DOI: https://doi.org/10.1038/306319a0
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