Unknown
PANGAEA
In:
Supplement to: Medina-Elizalde, Martín; Lea, David W (2005): The Mid-Pleistocene Transition in the Tropical Pacific. Science, 310(5750), 1009-1012, https://doi.org/10.1126/science.1115933
Publication Date:
2024-01-09
Description:
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.
Keywords:
130-806B; DRILL; Drilling/drill rig; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP
Type:
Dataset
Format:
application/zip, 2 datasets
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