Patrick, Andrew; Thunell, Robert C (1997): Stable isotope ratios of planktonic foraminifera from LGM sediments of the Pacific Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.868814, Supplement to: Patrick, A; Thunell, RC (1997): Tropical Pacific sea surface temperatures and upper water column thermal structure during the Last Glacial Maximum. Paleoceanography, 12(5), 649-657, https://doi.org/10.1029/97PA01553
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Abstract:
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 equatorial Pacific (WEP) was ~4°C cooler. The upper water column appears to have been less stratified in the EEP, with a steeper thermocline, interpreted as indicating an increase in upwelling during the LGM. The WEP maintained a well developed mixed layer and deep thermocline, similar to today. These results are consistent with a variety of recent tropical temperature estimates for the LGM.
Other version:
Thunell, Robert C; Patrick, Andrew (1997): Tropical Pacific SST Reconstruction. NOAA National Centers for Environmental Information, https://doi.org/10.25921/3XJB-A637
Coverage:
Median Latitude: -1.808350 * Median Longitude: -142.983350 * South-bound Latitude: -3.616700 * West-bound Longitude: 158.000000 * North-bound Latitude: 0.000000 * East-bound Longitude: -83.966700
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Patrick, A; Thunell, RC (1997): Stable isotope ratios of planktonic foraminifera of sediment core MW9109-15GGC. https://doi.org/10.1594/PANGAEA.868812
- Patrick, A; Thunell, RC (1997): Stable isotope ratios of planktonic foraminifera of sediment core TR163-31. https://doi.org/10.1594/PANGAEA.868813