Stable oxygen isotope ratios of Neogloboquadrina pachyderma from sediment cores of the Norwegian Sea ...

• Main Authors: Kellogg, Thomas B, Shackleton, Nicholas J, Duplessy, Jean-Claude
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1978
• Subjects: Climate Long-Range Investigation, Mapping, and Prediction CLIMAP; Quaternary Environment of the Eurasian North QUEEN; Neogloboquadrina pachyderma; Norwegian Sea; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.726546; https://doi.pangaea.de/10.1594/PANGAEA.726546

Three Norwegian Sea deep-sea cores, which penetrate to sediments at least 200,000 years old, were analyzed for oxygen isotope content, total calcium carbonate, and planktonic foraminifera. The oxygen isotopic stratigraphy was used to refine the time control for paleoclimatic and paleo-oceanographic events previously described for the region. Two pulses of relatively warm subpolar water entered the region between 124,000 B.P. and 115,000 B.P. (the last interglacial), and since about 13,000 B.P. The remaining portion of the last 150,000 years was characterized by extensive ice cover. The magnitude of the change in isotopic composition between peak glacial and peak interglacial conditions is larger than can be explained by the changing isotopic content of the oceans alone suggesting that large temperature and salinity effects are recorded in isotope curves from Norwegian Sea isotope curves. The magnitude of the isotopic change from substage 5e to 5d (greater than 1%) is attributed to a combination of changing ... : Supplement to: Kellogg, Thomas B; Duplessy, Jean-Claude; Shackleton, Nicholas J (1978): Planktonic foraminiferal and oxygen isotopic stratigraphy and paleoclimatology of Norwegian Sea deep-sea cores. Boreas, 7(1), 61-73 ...