High sea-surface temperatures during the Early Cretaceous Epoch

Journal name:
Nature Geoscience
Volume:
4,
Pages:
169–172
Year published:
DOI:
doi:10.1038/ngeo1081
Received
Accepted
Published online

The Early Cretaceous Epoch, about 145–100 million years ago, is generally thought of as a greenhouse period, with high atmospheric CO2 concentrations1 and high global mean temperatures2. But evidence for episodes of cooler conditions, and even transient glaciations, has been proposed3, 4, 5, 6, 7, 8, 9. Here we present sea-surface temperature records spanning the period from 142 to 128 million years ago (Berriasian–Barremian ages) from low and mid latitudes, reconstructed using the TEX86 palaeotemperature proxy. During this period, we find sea-surface temperatures exceeding 32°C at 15°–20°N and averaging 26°C at ~53°S. These temperatures substantially exceed modern temperatures at equivalent latitudes, and are incompatible with the notion of consistently cooler conditions in the earliest Cretaceous. Moreover, we find little variability in the sea-surface temperature records, even during the Valanginian carbon-isotope excursion ~138–135 million years ago, which was thought to be associated with marked temperature fluctuations5. We conclude that the earliest Cretaceous was characterized by a warm, stable climate, with a lower meridional temperature gradient than today.

At a glance

Figures

  1. Simplified palaeogeographic reconstruction of the Early Hauterivian ([sim]133[thinsp]Myr).
    Figure 1: Simplified palaeogeographic reconstruction of the Early Hauterivian (~133Myr).

    Adapted from Ocean Drilling Stratigraphic Network (ODSN) Paleomap project (http://www.odsn.de/odsn/services/paleomap/paleomap.html). DSDP/ODP sites sampled in this study shown as black circles.

  2. TEX86 data.
    Figure 2: TEX86 data.

    Berr=Berriasian,NF=NannofossilZone. Temperature on X-axis is SST (°C) calibrated according to (a) logarithmic equation (TEX86H; ref. 13) and (b) reciprocal equation (1/TEX86; ref. 13). Analytical error in TEX86 (black bar) is ±0.012. Calibration error for the logarithmic calibration is ±2.5°C, and for the reciprocal calibration is ±5.4°C (see Supplementary Information). Cores plotted against depth shown in Supplementary Fig. S2. Western Atlantic δ13Ccarb record for Sites 534 and 603 (ref. 26), with additional data from this study. Bracketed numbers in Key (for example 15°N) represent approximate palaeolatitude of sites at ~133Myr. Blue lines in evidence for cooling panel represent inferred cooler intervals from earlier studies.

  3. Meridional temperature gradients.
    Figure 3: Meridional temperature gradients.

    a TEX86 ratios for modern core-top calibration set13 and average Early Cretaceous (Hauterivian) values. b, Hauterivian SSTs (red symbols; a, a’ and a”) compared to Early Eocene (green symbols), Late Cretaceous (blue symbols) and Early Barremian (red circle) average TEX86 SST estimates, recalibrated according to logarithmic equation (TEX86H; ref. 13). Early Barremian, NW Germany (b; ref. 11); Site 1259, Turonian (c; ref. 16); Cenomanian-Turonian at Sites 367 (d; ref. 17) and 603 (e; ref. 17); Early Eocene data from the Tasman Plateau (f; ref. 20), New Zealand (g; ref. 21), Tanzania (h; ref. 15) and New Jersey (i; ref. 22; peak Paleocene Eocene Thermal Maximum SST is shown as i’). c, As for b but all data recalibrated after reciprocal equation (1/TEX86; ref. 13). Error bars indicate the total range of values in each dataset.

References

  1. Royer, D. L., Berner, R. A. & Park, J. Climate sensitivity constrained by CO2 concentrations over the past 420 million years. Nature 446, 530532 (2007).
  2. Skelton, P. W., Spicer, R. A., Kelley, S. P. & Gilmour, I. in The Cretaceous World (ed. Skelton, P. W.) (Cambridge Univ. Press, 2003).
  3. Kemper, E. Das Klima der Kreide-Zeit. Geol. Jb. A96, 5185 (1987).
  4. Price, G. D. The evidence and implications of polar ice during the Mesozoic. Earth Sci. Rev. 48, 183210 (1999).
  5. Erba, E., Bartolini, A. & Larson, R. L. Valanginian Weissert oceanic anoxic event. Geology 32:2, 149152 (2004).
  6. Mutterlose, J. et al. The Greenland–Norwegian Seaway: A key area for understanding Late Jurassic to Early Cretaceous paleoenvironments. Paleoceanography 18, PA000625 (2003).
  7. McArthur, J. M. et al. Palaeotemperatures, polar ice-volume, and isotope stratigraphy (Mg/Ca, δ 18O, δ 13C, 87Sr/86Sr): The Early Cretaceous (Berriasian, Valanginian, Hauterivian). Palaeogeogr. Palaeoclimatol. Palaeoecol. 248, 391430 (2007).
  8. Price, G. D., Ruffell, A. H., Jones, C. E., Kalin, R. M. & Mutterlose, J. Isotopic evidence for temperature variation during the early Cretaceous (late Ryazanian–mid-Hauterivian). J. Geol. Soc. 157, 335343 (2000).
  9. Kessels, K., Mutterlose, J. & Michalzik, D. Early Cretaceous (Valanginian–Hauterivian) calcareous nannofossils and isotopes of the northern hemisphere: Proxies for the understanding of Cretaceous climate. Lethaia 39, 157172 (2006).
  10. Erbacher, J., Huber, B. T., Norris, R. D. & Markey, M. Increased thermohaline stratification as a possible cause for an ocean anoxic event in the Cretaceous period. Nature 409, 325327 (2001).
  11. Mutterlose, J., Malkoc, M., Schouten, S., Sinninghe Damsté, J. S. & Forster, A. TEX86 and stable δ 18O paleothermometry of Early Cretaceous sediments: Implications for belemnite ecology and paleotemperature proxy application. Earth Planet. Sci. Lett. 298, 286298 (2010).
  12. Schouten, S., Hopmans, E. C., Schefuß, E. & Sinninghe Damsté, J. S. Distributional variations in marine crenarchaeotal membrane lipids: A new tool for reconstructing ancient sea water temperatures? Earth Planet. Sci. Lett. 204, 265274 (2002).
  13. Kim, J-H. et al. New indices and calibrations derived from the distribution of crenarchaeal isoprenoid tetraether lipids: Implications for past sea surface temperature reconstructions. Geochim. Cosmochim. Acta 74, 46394654 (2010).
  14. Pearson, P. N. et al. Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs. Nature 413, 481487 (2001).
  15. Pearson, P. N. et al. Stable warm tropical climate through the Eocene Epoch. Geology 35, 211214 (2007).
  16. Bornemann, A. et al. Isotopic evidence for glaciation during the Cretaceous supergreenhouse. Science 319, 189192 (2008).
  17. Schouten, S. et al. Extremely high sea-surface temperatures at low latitudes during the middle Cretaceous as revealed by archaeal membrane lipids. Geology 31, 10691072 (2003).
  18. Huber, M. A hotter greenhouse? Science 321, 353354 (2008).
  19. Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P. & Garcia, H. E. in World Ocean Atlas 2005, Temperature Vol. 1 (ed. Levitus, S.) (NOAA Atlas NESDIS Vol. 61, US Government Printing Office, 2006).
  20. Bijl, P. K. et al. Early Palaeogene temperature evolution of the southwest Pacific Ocean. Nature 461, 776779 (2009).
  21. Hollis, C. J. et al. Tropical sea temperatures in the high-latitude South Pacific during the Eocene. Geology 37, 99102 (2009).
  22. Zachos, J. C. et al. Extreme warming of mid-latitude coastal ocean during the Paleocene–Eocene Thermal Maximum: Inferences from TEX86 and isotope data. Geology 34, 737740 (2006).
  23. Bennett, M. R., Doyle, P. & Mather, A. E. Dropstones: Their origin and significance. Palaeogeogr. Palaeoclimatol. Palaeoecol. 121, 331339 (1996).
  24. Lini, A., Weissert, H. & Erba, E. The Valanginian carbon isotope event: A first episode of greenhouse climate conditions during the Cretaceous. Terra Nova 4, 374384 (1992).
  25. Weissert, H., Lini, A., Föllmi, K. B. & Kuhn, O. Correlation of Early Cretaceous carbon isotope stratigraphy and platform drowning events: A possible link? Palaeogeogr. Palaeoclimatol. Palaeoecol. 137, 189203 (1998).
  26. Bornemann, A. & Mutterlose, J. Calcareous nannofossil and δ 13C records from the Early Cretaceous of the western Atlantic Ocean: Evidence for enhanced fertilization across the Berriasian–Valanginian transition. Palaios 23, 821832 (2008).
  27. Adams, D. D., Hurtgen, M. T. & Sageman, B. B. Volcanic triggering of a biogeochemical cascade during Oceanic Anoxic Event 2. Nature Geosci. 3, 201204 (2010).
  28. Westermann, S. et al. The Valanginian δ 13C excursion may not be an expression of a global oceanic anoxic event. Earth Planet. Sci. Lett. 290, 118131 (2010).
  29. Melinte, M. & Mutterlose, J. A Valanginian (Early Cretaceous) ‘boreal nannoplankton excursion’ in sections from Romania. Mar. Micropaleontol. 43, 125 (2001).
  30. Stickley, C. E. et al. Evidence for middle Eocene Arctic sea ice from diatoms and ice-rafted debris. Nature 460, 376379 (2009).

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Author information

Affiliations

  1. Department of Earth Sciences, University College London, WC1E 6BT, UK

    • Kate Littler,
    • Stuart A. Robinson,
    • Paul R. Bown &
    • Alexandra J. Nederbragt
  2. Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre, University of Bristol, BS8 1TS, UK

    • Richard D. Pancost

Contributions

Core sampling was carried out by K.L. and S.A.R. TEX86 analysis was performed by K.L. with assistance from A.J.N. Carbon-isotope data was generated by K.L. with assistance from S.A.R. Organic geochemical maturation index data was generated by R.D.P. Manuscript was written by K.L., S.A.R., P.R.B. and R.D.P. The manuscript incorporates comments on content and structure from all authors.

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