Stable isotope ratios of planktonic foraminifera from LGM sediments of the Pacific Ocean ...
Using two cores from the eastern and western Pacific, we have attempted to better quantify tropical ocean temperatures during the last glacial in order to determine how this climatically-important region responds to large scale changes in climate forcing. By analyzing the oxygen isotopes of surface...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
1997
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.868814 https://doi.pangaea.de/10.1594/PANGAEA.868814 |
| Summary: | Using two cores from the eastern and western Pacific, we have attempted to better quantify tropical ocean temperatures during the last glacial in order to determine how this climatically-important region responds to large scale changes in climate forcing. By analyzing the oxygen isotopes of surface dwelling (G. sacculifer, G. ruber), thermocline dwelling (N. dutertrei, G. menardii, P. obliquiloculata) and sub-thermocline dwelling (G. inflata) planktonic foraminifera, both relative and absolute estimates of the changes in the temperature gradient over this depth interval have been made. Owing to poor carbonate preservation in the Holocene section of both cores, relative temperature estimates suggest only a slight glacial cooling (~2°C) at these locations, similar to that reported by CLIMAP [1976, 1981]. However, absolute temperature estimates determined from calcite-seawater paleothermometry indicate the eastern equatorial Pacific (EEP) was ~3°C cooler during the last glacial maximum (LGM), while the western ... : Supplement to: Patrick, Andrew; Thunell, Robert C (1997): Tropical Pacific sea surface temperatures and upper water column thermal structure during the Last Glacial Maximum. Paleoceanography, 12(5), 649-657 ... |
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