Abstract
Marked changes in the deep-water temperature of the different oceanic basins during the past 125 kyr are revealed by a detailed comparison of the oxygen isotopic composition ofbenthicforaminiferafrom sediment cores taken from the Norwegian Sea, and the Pacific, Atlantic and Southern oceans. The last interglacial deep-water temperatures were similar to the modern ones. At the 5e/5d transition, around 115 kyr BP, the deep-water temperatures dropped below approximately 0 °C in the Pacific and southern Indian oceans. In the Atlantic Ocean, the deep-water temperature dropped in 2 successive steps at ˜115 and 75ky BP. The global ocean deep-water temperatures were in the 0 to −1 °C range for the whole of the last ice age (isotope stages 4–2).
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Labeyrie, L., Duplessy, J. & Blanc, P. Variations in mode of formation and temperature of oceanic deep waters over the past 125,000 years. Nature 327, 477–482 (1987). https://doi.org/10.1038/327477a0
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DOI: https://doi.org/10.1038/327477a0
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