Marine radiocarbon evidence for the mechanism of deglacial atmospheric CO2 rise
Marchitto, T.M.; Lehman, S.J.; Ortiz, J.D.; Flückiger, J.; van Geen, A. (2007). Marine radiocarbon evidence for the mechanism of deglacial atmospheric CO2 rise. Science (Wash.) 316(5830): 1456-1459. https://dx.doi.org/10.1126/science.1138679
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
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| Keywords |
Chemical compounds > Carbon compounds > Atmospheric gases > Carbon dioxide
Deglaciation
Marine/Coastal |
| Authors | | Top |
- Marchitto, T.M.
- Lehman, S.J.
- Ortiz, J.D.
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- Flückiger, J.
- van Geen, A.
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| Abstract |
We reconstructed the radiocarbon activity of intermediate waters in the eastern North Pacific over the past 38,000 years. Radiocarbon activity paralleled that of the atmosphere, except during deglaciation, when intermediate-water values fell by more than 300 per mil. Such a large decrease requires a deglacial injection of very old waters from a deep-ocean carbon reservoir that was previously well isolated from the atmosphere. The timing of intermediate-water radiocarbon depletion closely matches that of atmospheric carbon dioxide rise and effectively traces the redistribution of carbon from the deep ocean to the atmosphere during deglaciation. |
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