Stable carbon and oxygen isotope records of Globigerinoides sacculifer from Pacific Ocean sediment cores ...

• Main Authors: Shackleton, Nicholas J, Le, Jianning, Mix, Alan C, Hall, Michael A
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1992
• Subjects: Piston corer; ERDC; RC17; V24; Thomas Washington; Robert Conrad; Vema; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.738440; https://doi.pangaea.de/10.1594/PANGAEA.738440

We have stacked planktonic carbon isotope data from three cores in the western equatorial Pacific in order to generate a new reconstruction of atmospheric carbon dioxide over the past 450,000 years. Our new reconstruction resembles that of Shackleton et al. (1983) based on data from East Pacific core V19-30, which successfully predicted features that were subsequently verified by Barnola et al. (1987) in the record from the Vostock ice core. In addition the new data confirm the discovery of Shackleton and Pisias (1985) that changes in atmospheric CO2 lead changes in ice volume and hence probably contributed to the glacial-interglacial cycles. Our new reconstruction avoids some of the deficiencies of the previous reconstruction: in particular the planktonic species (Neogloboquadrina dutertrei), on which the earlier reconstruction depends, does not calcify in truly nutrient-free surface water as the model assumes, whereas our new reconstruction uses Globigerinoides sacculifer which is expected to be more ... : Supplement to: Shackleton, Nicholas J; Le, Jianning; Mix, Alan C; Hall, Michael A (1992): Carbon istotope records from Pacific surface waters and atmospheric carbon dioxide. Quaternary Science Reviews, 11(4), 387-400 ...