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Muted climate variations in continental Siberia during the mid-Pleistocene epoch

Author

Listed:
  • Alexander A. Prokopenko

    (University of South Carolina
    United Institute of Geology, Geophysics and Mineralogy, Siberian Branch of Russian Academy of Sciences)

  • Douglas F. Williams

    (University of South Carolina)

  • Mikhail I. Kuzmin

    (Institute of Geochemistry, Siberian Branch of Russian Academy of Sciences)

  • Eugene B. Karabanov

    (University of South Carolina
    Institute of Geochemistry, Siberian Branch of Russian Academy of Sciences)

  • Galina K. Khursevich

    (Institute of Geological Sciences)

  • John A. Peck

    (University of Akron)

Abstract

The large difference in carbon and oxygen isotope data from the marine record between marine oxygen isotope stage 12 (MIS 12) and MIS 11, spanning the interval between about 480 and 380 kyr ago, has been interpreted as a transition between an extremely cold glacial period and an unusually warm interglacial period, with consequences for global ice volume, sea level and the global carbon cycle1,2,3,4. The extent of the change is intriguing, because orbital forcing is predicted to have been relatively weak at that time5. Here we analyse a continuous sediment record from Lake Baikal, Siberia, which reveals a virtually continuous interglacial diatom assemblage, a stable littoral benthic diatom assemblage and lithogenic sediments with ‘interglacial’ characteristics for the period from MIS 15a to MIS 11 (from about 580 to 380 kyr ago). From these data, we infer significantly weaker climate contrasts between MIS 12 and 11 than during more recent glacial–interglacial transitions in the late Pleistocene epoch (about 130 to 10 kyr ago). For the period from MIS 15a to MIS 11, we also infer an apparent lack of extensive mountain glaciation.

Suggested Citation

  • Alexander A. Prokopenko & Douglas F. Williams & Mikhail I. Kuzmin & Eugene B. Karabanov & Galina K. Khursevich & John A. Peck, 2002. "Muted climate variations in continental Siberia during the mid-Pleistocene epoch," Nature, Nature, vol. 418(6893), pages 65-68, July.
    • Handle: RePEc:nat:nature:v:418:y:2002:i:6893:d:10.1038_nature00886
    DOI: 10.1038/nature00886
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