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Ventilation of the North Atlantic Ocean during the Last Glacial Maximum: A comparison between simulated and observed radiocarbon ages
Article first published online: 8 APR 2003
DOI: 10.1029/2002PA000762
Copyright 2003 by the American Geophysical Union.
1944-9186/asset/cover.gif?v=1&s=0ed6ba36ed17e0ac1fc75a822ae723f78ab98899 "Paleoceanography")
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How to Cite
, , , and (2003), Ventilation of the North Atlantic Ocean during the Last Glacial Maximum: A comparison between simulated and observed radiocarbon ages, Paleoceanography, 18, 1023, doi:10.1029/2002PA000762, 2.
Publication History
- Issue published online: 8 APR 2003
- Article first published online: 8 APR 2003
- Manuscript Accepted: 22 OCT 2002
- Manuscript Revised: 27 SEP 2002
- Manuscript Received: 28 JAN 2002
- Abstract
- Article
- References
- Cited By
Keywords:
- Last Glacial Maximum;
- thermohaline circulation;
- radiocarbon;
- climate modeling
[1] The distribution of radiocarbon during simulations of the Last Glacial Maximum with a coupled ocean-atmosphere-sea ice model is compared with sediment core measurements from the equatorial Atlantic Ceara Rise, Blake Ridge, Caribbean Sea, and South China Sea. During these simulations we introduce a perturbation of North Atlantic freshwater fluxes leading to varying strengths of the Atlantic meridional overturning. The best fit with the observations is obtained for an overturning weakened by 40% compared with today. Further, we simulate the phenomenon of an “age reversal” found in deep sea corals, but we suggest that this indicates rather a sudden interruption of deep water formation instead of an increase in ventilation, which was suggested earlier.