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Palaeoclimate

Global warmth with little extra CO2

Nature Geoscience volume 3, pages 6–7 (2010)Cite this article

Most climate models consider only short-term processes such as cloud and sea-ice formation when assessing Earth's sensitivity to greenhouse-gas forcing. Mounting evidence indicates that the response could be stronger if boundary conditions change drastically.

In the Early Pliocene, three to five million years ago, global temperatures were about 3–4° C warmer than today in the low latitudes, and up to 10° C warmer nearer the poles1,2. Climate simulations and reconstructions of this relatively recent period (geologically speaking) may help constrain realistic magnitudes of future warming3. Under commonly assumed greenhouse forcing scenarios, atmospheric carbon dioxide concentrations of 500–600 ppmv — roughly twice the preindustrial level — would be required to produce the climate of the Pliocene. Writing in Nature Geoscience, Pagani et al.4 and Lunt et al.5 suggest that much lower carbon dioxide concentrations in the atmosphere governed the Early Pliocene warm period, with potentially dire implications for the long-term future of the planet.

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Figure 1: Envelopes of temperature change (ΔT) compared with preindustrial temperatures for different atmospheric carbon dioxide concentrations.

References

  1. Dowsett, H. J., Chandler, M. A. & Robinson, M. M. Phil. Trans. R. Soc. A 367, 69–84 (2009).

    Article  Google Scholar 

  2. Dekens, P. S., Ravelo, A. C. & McCarthy, M. D. Paleoceanography 22, 1–12 (2007).

    Article  Google Scholar 

  3. IPCC Climate Change 2007: Synthesis Report (eds Pachauri, R. K. & Reisinger, A.) (Cambridge Univ. Press, 2007).

  4. Pagani, M., Liu, Z., LaRiviere, J. & Ravelo, A. C. Nature Geosci. doi:10.1038/ngeo724 (2009).

  5. Lunt, D. A. et al. Nature Geosci. doi:10.1038/ngeo706 (2009).

  6. Lea, D. J. Clim. 17, 2170–2179 (2004).

    Article  Google Scholar 

  7. MARGO Project Members Nature Geosci. 2, 128–132 (2009).

  8. Lüthi, D. et al. Nature 453, 379–382 (2008).

    Article  Google Scholar 

  9. Tripati, A. K., Roberts, C. D. & Eagle, R. A. Science 326, 1394–1397 (2009).

    Article  Google Scholar 

  10. Pliocene Research, Interpretation and Synoptic Mapping (PRISM) <http://geology.er.usgs.gov/eespteam/prism> (2009).

  11. http://www.plioclimworkshop.com

  12. Kürschner, W. M., van der Burgh, J., Visscher, H. & Dilcher, D. L. Mar. Micropaleontol. 27, 299–312 (1996).

    Article  Google Scholar 

  13. Knutti, R. & Hegerl, G. C. Nature Geosci. 1, 735–743 (2008).

    Article  Google Scholar 

  14. Friedlingstein, P. et al. J. Clim. 19, 3337–3353 (2006).

    Article  Google Scholar 

  15. Sigman, D. M., Jaccard, S. L. & Haug, G. H. Nature 428, 59–63 (2004).

    Article  Google Scholar 

  16. Etourneau, J., Martinez, P., Blanz, T. & Schneider, R. R. Geology 37, 871–874 (2009).

    Article  Google Scholar 

Download references

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  1. Birgit Schneider and Ralph Schneider are at the Institute of Geoscience and Excellence Cluster 'Future Ocean', Christian-Albrechts University, 24118 Kiel, Germany. bschneider@gpi.uni-kiel.de rschneider@gpi.uni-kiel.de,

    Birgit Schneider & Ralph Schneider

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  1. Birgit Schneider
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Schneider, B., Schneider, R. Global warmth with little extra CO2. Nature Geosci 3, 6–7 (2010). https://doi.org/10.1038/ngeo736

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