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The mid-Pleistocene transition in the Tropical Pacific
Medina-Elizalde, M.; Lea, D.W. (2005). The mid-Pleistocene transition in the Tropical Pacific. Science (Wash.) 310(5750): 1009-1012. http://dx.doi.org/10.1126/science.1115933
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Medina-Elizalde, M.
  • Lea, D.W.

Abstract
    A sea surface temperature (SST) record based on planktonic foraminiferal magnesium/calcium ratios from a site in the western equatorial Pacific warm pool reveals that glacial-interglacial oscillations in SST shifted from a period of 41,000 to 100,000 years at the mid-Pleistocene transition, 950,000 years before the present. SST changes at both periodicities were synchronous with eastern Pacific cold-tongue SSTs but preceded changes in continental ice volume. The timing and nature of tropical Pacific SST changes over the mid-Pleistocene transition implicate a shift in the periodicity of radiative forcing by atmospheric carbon dioxide as the cause of the switch in climate periodicities at this time.

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