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| Winguth, Ame; Archer, D; Duplessy, Jc; Maier-reimer, E; Mikolajewicz, U. |
| We use a carbon cycle model coupled to an ocean general circulation model to explore the links between sea surface boundary conditions, the deep-sea circulation, and the distribution of paleonutrient tracers (delta(13)C and Cd/Ca) from Last Glacial Maximum (21,000 B.P.) sediments. A glacial flow field with a shallower and 50% reduced North Atlantic overturning circulation generally reproduces the tracer data but cannot explain the strong glacial-interglacial shift in delta(13)C in the Southern Ocean. Sensitivity experiments with changes of +/-1 in salinity in the glacial salinity boundary fields show circulation patterns ranging from even stronger than the present day one to nearly a shutdown of the Atlantic deep-sea circulation. Our model results indicate... |
| Tipo: Text |
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| Ano: 1999 |
URL: https://archimer.ifremer.fr/doc/00239/35061/34595.pdf |
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