Stable carbon and oxygen isotope record of Marine Isotope Stage 11 in the South Atlantic ...

• Main Authors: Hodell, David A, Charles, Christopher D, Ninnemann, Ulysses S
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2000
• Subjects: Drilling/drill rig; Piston corer; Leg114; Joides Resolution; Ocean Drilling Program ODP; Neogloboquadrina pachyderma; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.742701; https://doi.pangaea.de/10.1594/PANGAEA.742701

Oxygen and carbon isotopic gradients in surface waters were reconstructed for the past 450 kyr by analysis of the planktic foraminifer Neogloboquadrina pachyderma in cores located at approximately 43°, 47°, and 54°S across the Polar Frontal Zone in the South Atlantic sector of the Southern Ocean. Comparison of the oxygen isotopic records for peak interglacial conditions during the past 450 kyr reveals that Marine Isotope Stage (MIS) 11 was not substantially warmer than other interglacials at high southern latitudes, although the period of warmth lasted longer. The carbonate and carbon isotope chemistry of surface and deep water represent the truly distinctive aspects of Stage 11 in the Southern Ocean. Peak carbonate production occurred at high southern latitudes during MIS 11, resulting in light-colored, high-carbonate sediments deposited throughout the Southern Ocean above the lysocline. Carbon isotopic values of benthic foraminifera in cores bathed by Circumpolar Deep Water (CPDW) were highest during ... : Supplement to: Hodell, David A; Charles, Christopher D; Ninnemann, Ulysses S (2000): Comparison of interglacial stages in the South Atlantic sector of the southern ocean for the past 450 kyr: implifications for Marine Isotope Stage (MIS) 11. Global and Planetary Change, 24(1), 7-26 ...