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Modelled atmospheric temperatures and global sea levels over the past million years

Abstract

Marine records of sediment oxygen isotope compositions show that the Earth's climate has gone through a succession of glacial and interglacial periods during the past million years. But the interpretation of the oxygen isotope records is complicated because both isotope storage in ice sheets and deep-water temperature affect the recorded isotopic composition1,2,3,4,5. Separating these two effects would require long records of either sea level or deep-ocean temperature, which are currently not available. Here we use a coupled model of the Northern Hemisphere ice sheets6 and ocean temperatures, forced to match an oxygen isotope record for the past million years compiled from 57 globally distributed sediment cores, to quantify both contributions simultaneously. We find that the ice-sheet contribution to the variability in oxygen isotope composition varied from ten per cent in the beginning of glacial periods to sixty per cent at glacial maxima, suggesting that strong ocean cooling preceded slow ice-sheet build-up. The model yields mutually consistent time series of continental mean surface temperatures between 40 and 80° N, ice volume and global sea level. We find that during extreme glacial stages, air temperatures were 17 ± 1.8 °C lower than present, with a 120 ± 10 m sea level equivalent of continental ice present.

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References

  1. 1

    Waelbroeck, C. et al. Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records. Quat. Sci. Rev. 21, 295–305 (2002)

  2. 2

    Lambeck, K., Esat, T. M. & Potter, E. Links between climate and sea levels for the past three million years. Nature 419, 199–206 (2002)

  3. 3

    Shackleton, N. J. The 100,000-year ice-age cycle identified and found to lag temperature, carbon dioxide, and orbital eccentricity. Science 289, 1897–1902 (2000)

  4. 4

    Paillard, D. Glacial cycles: toward a new paradigm. Rev. Geophys. 39, 325–346 (2001)

  5. 5

    Lea, D. W., Martin, P. A., Pak, D. K. & Sperbo, H. J. Reconstructing a 350-kyr history of sea level using planktonic Mg/Ca and oxygen isotope records from a Cocos Ridge core. Quat. Sci. Rev. 21, 283–293 (2002)

  6. 6

    Bintanja, R., van de Wal, R. S. W. & Oerlemans, J. Global ice volume variations through the last glacial cycle simulated by a 3-D ice-dynamical model. Quat. Int. 95–96, 11–23 (2002)

  7. 7

    Imbrie, J., et al. in Milankovitch and Climate (eds Berger, A. L. & Reidel, D.) 269–305 (Kluwer Academic, Boston, 1984)

  8. 8

    Duplessy, J.-C., Labeyrie, L. & Waelbroeck, C. Constraints on the ocean oxygen isotopic enrichment between the Last Glacial Maximum and the Holocene: paleoceanographic implications. Quat. Sci. Rev. 21, 315–330 (2002)

  9. 9

    Cutler, K. B. et al. Rapid sea-level fall and deep-ocean temperature change since the last interglacial period. Earth Planet. Sci. Lett. 206, 253–271 (2003)

  10. 10

    Dwyer, G. S. et al. North Atlantic deepwater temperature change during late Pliocene and late Quaternary climatic cycles. Science 270, 1347–1351 (1995)

  11. 11

    Lisiecki, L. E. & Raymo, M. E. A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records. Paleoceanography 20, doi:10.1029/2004PA001071 (2005)

  12. 12

    Bintanja, R., van de Wal, R. S. W. & Oerlemans, J. A new method to estimate ice age temperatures. Clim. Dyn. 24, 197–211 (2005)

  13. 13

    Kageyama, M. et al. The last glacial maximum climate over Europe and western Siberia: a PMIP comparison between models and data. Clim. Dyn. 17, 23–43 (2001)

  14. 14

    EPICA community members, Eight glacial cycles from an Antarctic ice core. Nature 429, 623–628 (2004)

  15. 15

    North Greenland Ice Core Project members, High-resolution record of Northern Hemisphere climate extending into the last interglacial period. Nature 431, 147–151 (2004)

  16. 16

    Siddall, M. et al. Sea-level fluctuations during the last glacial cycle. Nature 423, 853–858 (2003)

  17. 17

    Lambeck, K. & Chappell, J. Sea level change through the last glacial cycle. Science 292, 679–686 (2001)

  18. 18

    Clark, P. U., Alley, R. B. & Pollard, D. Northern hemisphere ice sheet influences on global climate change. Science 286, 1104–1111 (1999)

  19. 19

    Tarasov, L. & Peltier, W. R. Terminating the 100 kyr ice age cycle. J. Geophys. Res. 102, 21665–21693 (1997)

  20. 20

    Svendsen, J. I. et al. Late quaternary ice sheet history of northern Eurasia. Quat. Sci. Rev. 23, 1229–1271 (2004)

  21. 21

    Cortijo, E. et al. Eemian cooling in the Norwegian Sea and North Atlantic ocean preceding continental ice sheet growth. Nature 372, 446–449 (1994)

  22. 22

    Schragg, D. P., Hampt, G. & Murray, D. W. Pore fluid constraints on the temperature and oxygen isotope composition of the glacial ocean. Science 372, 1930–1932 (1996)

  23. 23

    Mix, A. C. & Ruddiman, W. F. Oxygen-isotope analyses and Pleistocene ice volumes. Quat. Res. 21, 1–20 (1984)

  24. 24

    Clarke, G. K. C. & Marshall, S. J. Isotopic balance of the Greenland Ice sheet: modelled concentrations of water isotopes from 30,000 bp to present. Quat. Sci. Rev. 21, 419–430 (2002)

  25. 25

    Cuffey, K. M. et al. Large Arctic temperature change at the Wisconsin-Holocene glacial transition. Science 270, 455–458 (1995)

  26. 26

    Fricke, H. C. & O'Neil, J. R. The correlation between 18O/16O ratios of meteoric water and surface temperature: its use in investigating terrestrial climate change over geologic time. Earth Planet. Sci. Lett. 170, 181–196 (1999)

  27. 27

    Huybrechts, P. Sea-level changes at the LGM from ice-dynamic reconstructions of the Greenland and Antarctic ice sheets during glacial cycles. Quat. Sci. Rev. 21, 203–231 (2002)

  28. 28

    Bintanja, R. & Oerlemans, J. The effect of reduced ocean overturning on the climate of the last glacial maximum. Clim. Dyn. 12, 523–533 (1996)

  29. 29

    Shackleton, N. J. Les Méthodes Quantitatives d'étude des Variations du Climat au Cours du Pleistocène CNRS, Gif sur Yvette, [in English] 203–209 (1974)

  30. 30

    Jouzel, J., Hoffmann, G., Parrenin, F. & Waelbroeck, C. Atmospheric oxygen 18 and sea-level changes. Quat. Sci. Rev. 21, 307–314 (2002)

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Acknowledgements

Financial support was provided by the Netherlands Organisation of Scientific Research (NWO), in the framework of the SPINOZA award of J. Oerlemans. Constructive remarks were provided by M. Siddall and D. Dahl-Jensen.

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Correspondence to Richard Bintanja.

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Reprints and permissions information is available at npg.nature.com/reprintsandpermissions. The authors declare no competing financial interests.

Supplementary information

Supplementary Discussion

This file shows and discusses temperature and sea level reconstructions based on two individual marine isotope records (DSDP 607 from the Atlantic Ocean and ODP 846 from the Pacific Ocean). It also contains a comparison between sea levels based on linear scaling of the marine isotope signal and modelled values. (DOC 194 kb)

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Figure 1: Schematic outline of the inverse procedure.
Figure 2: 1,070-kyr time series of reconstructed Northern Hemisphere surface air temperature.
Figure 3: Time series of past global sea level.
Figure 4: Fluctuations in the various isotope signals over the 1,070-kyr period.

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