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Direct Determination of the Timing of Sea Level Change During Termination II
Abstract
An outcrop within the last interglacial terrace on Barbados contains corals that grew during the penultimate deglaciation, or Termination II. We used combined 230 Th and 231 Pa dating to determine that they grew 135.8 ± 0.8 thousand years ago, indicating that sea level was 18 ± 3 meters below present sea level at the time. This suggests that sea level had risen to within 20% of its peak last-interglacial value by 136 thousand years ago, in conflict with Milankovitch theory predictions. Orbital forcing may have played a role in the deglaciation, as may have isostatic adjustments due to large ice sheets. Other corals in the same outcrop grew during oxygen isotope (δ 18 O) substage 6e, indicating that sea level was 38 ± 5 meters below present sea level, about 168.0 thousand years ago. When compared to the δ 18 O signal in the benthic V19-30/V19-28 record at that time, the coral data extend to the previous glacial cycle the conclusion that deep-water temperatures were colder during glacial periods.
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Cited by
Timing, Duration, and Transitions of the Last Interglacial Asian Monsoon
Yuan, D., Cheng, H., Edwards, R. L., Dykoski, C. A., Kelly, M. J., Zhang, M., Qing, J., Lin, Y., Wang, Y., Wu, J., et al. (2004) · Science · doi:10.1126/science.1091220 · Cited by 1,250
Self-citationLinks between climate and sea levels for the past three million years
Lambeck, K., Esat, T. M., & Potter, E.-K. (2002) · Nature · doi:10.1038/nature01089 · Cited by 914
The Sun's Role in Climate Variations
Rind, D. (2002) · Science · doi:10.1126/science.1069562 · Cited by 310
Metadata
- Authors
- Gallup, C. D., Cheng, H., Taylor, F. W., & Edwards, R. L.
- Venue
- Science
- Published
- 2002-01-11
- Volume
- 295
- Issue
- 5553
- Pages
- 310-313
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2027949041
- Cited by
- 233
- References
- 0
- FWCI
- 15.54
- Type
- journal article
- Language
- en
- Open access
- closed
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