Pore Fluid Constraints on the Temperature and Oxygen Isotopic Composition of the Glacial Ocean
- 28 June 1996
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 272 (5270) , 1930-1932
- https://doi.org/10.1126/science.272.5270.1930
Abstract
Pore fluids from the upper 60 meters of sediment 3000 meters below the surface of the tropical Atlantic indicate that the oxygen isotopic composition (δ 18 O) of seawater at this site during the last glacial maximum was 0.8 ± 0.1 per mil higher than it is today. Combined with the δ 18 O change in benthic foraminifera from this region, the elevated ratio indicates that the temperature of deep water in the tropical Atlantic Ocean was 4°C colder during the last glacial maximum. Extrapolation from this site to a global average suggests that the ice volume contribution to the change in δ 18 O of foraminifera is 1.0 per mil, which partially reconciles the foraminiferal oxygen isotope record of tropical sea surface temperatures with estimates from Barbados corals and terrestrial climate proxies.Keywords
This publication has 24 references indexed in Scilit:
- An Oceanographic Explanation for the Apparent Carbon Isotope‐Cadmium Discordancy in the Glacial Antarctic?Paleoceanography and Paleoclimatology, 1993
- Determination of δ18O of Seawater in the Deep Ocean during the Last Glacial MaximumPaleoceanography and Paleoclimatology, 1993
- Oxygen Isotopes in Biogenic Silica: Global Changes in Ocean Temperature and Isotopic CompositionScience, 1992
- Reconstructing past particle fluxes in the tropical Atlantic OceanPaleoceanography and Paleoclimatology, 1990
- Atlantic Ocean thermohaline circulation of the last 150,000 years: Relationship to climate and atmospheric CO2Paleoceanography and Paleoclimatology, 1990
- Late Pleistocene Southern Ocean δ13C variabilityPaleoceanography and Paleoclimatology, 1990
- Deepwater source variations during the last climatic cycle and their impact on the global deepwater circulationPaleoceanography and Paleoclimatology, 1988
- Oxygen-Isotope Analyses and Pleistocene Ice VolumesQuaternary Research, 1984
- Hawaiian Glacial AgesQuaternary Research, 1979
- Glacier Oxygen-18 Content and Pleistocene Ocean TemperaturesScience, 1969