Abstract
RECENT geochemical data1,2 have challenged the view that rapid climate fluctuations in the North Atlantic at the end of the last glacial were caused by the thermohaline circulation of the ocean being switched 'on' or 'off'. Instead, these data suggest that the circulation pattern must have switched between a warm, deep mode and a cold, shallow mode, probably associated with different sites of deep convection3. Here I present simulations with a three-dimensional ocean model, coupled to an idealized atmosphere, which show this kind of transition. The mechanism for the transition is a rearrangement of convection in the North Atlantic, triggered by a brief freshwater pulse. This results in a drop in sea surface temperature in the North Atlantic by up to 5 °C within less than 10 years. The rate of North Atlantic Deep Water (NADW) forma-tion is the same in the cold climate as in the warm climate, but NADW sinks to intermediate depths only, while Antarctic Bottom Water pushes north to fill the entire abyssal Atlantic.
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References
Veum, T. et al. Nature 356, 783–785 (1992).
Lehman, S. J. & Keigwin, L. D. Nature 356, 757–762 (1992).
Zahn, R. Nature 356, 744–746 (1992).
Boyle, E. A. & Keigwin, L. Nature 330, 35–40 (1987).
Keigwin, L. D. et al. J. geophys. Res. 96, 16811–16826 (1991).
Trenberth, K. E. & Solomon, A. Clim. Dyn. 10, 107–134 (1994).
Levitus, S. Climatological Atlas of the World Ocean (US Dept of Commerce, NOAA, Washington DC, 1982).
Manabe, S. & Stouffer, R. J. J. Clim. 1, 841–866 (1988).
Maier-Reimer, W. & Mikolajewicz, U. in Oceanography (eds Ayala-Castan̄ares, A., Wooster, W. & Yán̄ez-Arancibia, A.) 87–100 (UNAM, México, 1989).
Marotzke, J. & Willebrand, J. J. phys. Oceanogr. 21, 1372–1385 (1991).
Haney, R. L. J. phys. Oceanogr. 1, 241–248 (1971).
Rahmstorf, S. & Willebrand, J. J. phys. Oceanogr. (in the press).
Sarnthein, M. et al. Paleoceanography 9, 209–267 (1994).
Kushnir, Y. J. Clim. 7, 142–157 (1994).
Rahmstorf, S. J. Clim. (in the press).
Stommel, H. Tellus 13, 224–230 (1961).
Welander, P. Dyn. Atmos. Oceans 6, 233–242 (1982).
Lenderink, G. & Haarsma, R. J. J. phys. Oceanogr. 24, 1480–1493 (1994).
Fairbanks, R. G. Nature 342, 637–642 (1989).
Weaver, A. J. & Hughes, T. M. C. Nature 367, 447–450 (1994).
Send, U. & Marshall, J. J. phys. Oceanogr. (in the press).
Lehman, S. J. & Keigwin, L. D. Nature 358, 197–198 (1992).
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Rahmstorf, S. Rapid climate transitions in a coupled ocean–atmosphere model. Nature 372, 82–85 (1994). https://doi.org/10.1038/372082a0
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DOI: https://doi.org/10.1038/372082a0
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