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Lynch-Stieglitz, Jean; Fairbanks, Richard G; Charles, Christopher D (1994): Stable isotope record of foraminifera from the Southern Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.729815, Supplement to: Lynch-Stieglitz, J et al. (1994): Glacial-interglacial history of Antarctic Intermediate Water: Relative strengths of Antarctic versus Indian Ocean sources. Paleoceanography, 9(1), 7-30, https://doi.org/10.1029/93PA02446

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Abstract:
Sediment cores from the southern continental margin of Australia are near the formation region of Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water and record the changes in these water masses from the last glacial maximum through the present. Carbon and oxygen isotopes were measured on the benthic foraminiferal species Planulina wuellerstrorfi for both the Recent and last glacial maximum sections of the cores and were then used to reconstruct temperature and carbon isotopic water column profiles. The glacial oxygen isotope profile indicates a vertical temperature structure for this region similar to that in today's Subantarctic Zone. Although intermediate water delta13C cannot be used as a nutrient tracer in this region because of the large influence of air-sea carbon isotopic exchange on this water mass, delta13C can be used as a water mass tracer. Today, AAIW properties reflect contributions from cool, fresh Antarctic Surface Waters (2/3) and warm, salty waters from the Indian Ocean (1/3). When examined in conjuction with the glacial delta13C and delta18C data from the north Indian and Southern Oceans, our data suggest a much reduced contribution of North Indian Ocean intermediate water to glacial Antarctic Intermediate Water relative to the contribution of Antarctic Surface Water. This fresher, cooler glacial Antarctic Intermediate Water would be distributed to the intermediate-depth ocean, thus decreasing the transport of salt produced in the North Indian Ocean to the rest of the world's oceans. Combined with evidence for a reduced influence of North Atlantic Deep Water, these results suggest major changes in the pathways for the redistribution of heat and salt in the glacial ocean.
Coverage:
Median Latitude: -43.256394 * Median Longitude: 127.157307 * South-bound Latitude: -77.666667 * West-bound Longitude: -20.860000 * North-bound Latitude: -37.550000 * East-bound Longitude: 165.000000
Date/Time Start: 1962-07-23T00:00:00 * Date/Time End: 1985-04-17T00:00:00
Event(s):
AT_II-107_22 * Latitude: -54.792000 * Longitude: -3.330000 * Elevation: -2768.0 m * Campaign: ATII_USA * Basis: Atlantis II (1963) * Method/Device: Gravity corer (GC)
BLW2 * Latitude: -77.666667 * Longitude: 165.000000 * Elevation: -370.0 m * Location: South Pacific * Method/Device: Piston corer (PC)
CHN115-26PG * Latitude: -53.600000 * Longitude: 0.100000 * Elevation: -2643.0 m * Location: South Atlantic * Method/Device: Piston corer (PC)
Size:
11 datasets

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Datasets listed in this publication series

  1. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table 3) Stable carbon isotope ratios of Neogloboquadrina pachyderma from surface sediments in the Southern Ocean. https://doi.org/10.1594/PANGAEA.52667
  2. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table 3) Stable oxygen isotope ratios of Neogloboquadrina pachyderma from surface sediments in the Southern Ocean. https://doi.org/10.1594/PANGAEA.55519
  3. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (2006): (Table B1) Stable isotope ratio of benthic foraminifera from sediment core RS67-GC13. https://doi.org/10.1594/PANGAEA.386588
  4. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of Planulina wuellerstorfi from sediment core RS67-GC27. https://doi.org/10.1594/PANGAEA.386600
  5. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core RS67-GC16. https://doi.org/10.1594/PANGAEA.386598
  6. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core RS67-GC3. https://doi.org/10.1594/PANGAEA.386601
  7. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core RS67-GC52. https://doi.org/10.1594/PANGAEA.386603
  8. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core RS78-GC18. https://doi.org/10.1594/PANGAEA.386604
  9. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core SO36-17SL. https://doi.org/10.1594/PANGAEA.386606
  10. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core SO36-7SL. https://doi.org/10.1594/PANGAEA.386608
  11. Lynch-Stieglitz, J; Fairbanks, RG; Charles, CD (1994): (Table B1) Stable isotope ratios of benthic foraminifera from sediment core V18-222. https://doi.org/10.1594/PANGAEA.386610