Huang, Huang; Gutjahr, Marcus; Eisenhauer, Anton; Kuhn, Gerhard (2019): Authigenic Pb and Nd isotope composition of sediments from the Southern Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.909084
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Abstract:
Weddell Sea-derived Antarctic Bottom Water (AABW) is one of the most important deep water masses in the Southern Hemisphere occupying large portions of the deep Southern Ocean (SO) today. While substantial changes in SO-overturning circulation were previously suggested, the state of Weddell Sea AABW export during glacial climates remains poorly understood. Here we report seawater-derived Nd and Pb isotope records that provide evidence for the absence of Weddell Sea-derived AABW in the Atlantic sector of the SO during the last two glacial maxima. Increasing delivery of Antarctic Pb to regions outside the Weddell Sea traced SO frontal displacements during both glacial terminations. The export of Weddell Sea-derived AABW resumed late during glacial terminations, coinciding with the last major atmospheric CO~2~ rise in the transition to the Holocene and the Eemian. Our new records lend strong support for a previously inferred AABW overturning stagnation event during the peak Eemian interglacial.
Supplement to:
Huang, Huang; Gutjahr, Marcus; Eisenhauer, Anton; Kuhn, Gerhard (2020): No detectable Weddell Sea Antarctic Bottom Water export during the Last and Penultimate Glacial Maximum. Nature Communications, 11(1), https://doi.org/10.1038/s41467-020-14302-3
Project(s):
Coverage:
Median Latitude: -60.181255 * Median Longitude: -9.457426 * South-bound Latitude: -74.100330 * West-bound Longitude: -50.000660 * North-bound Latitude: -49.013330 * East-bound Longitude: 15.006300
Date/Time Start: 1983-12-11T00:00:00 * Date/Time End: 2002-12-20T21:48:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
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4 datasets
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Datasets listed in this publication series
- Huang, H; Gutjahr, M; Eisenhauer, A et al. (2019): Authigenic Pb isotope composition of ODP Site 177-1094. https://doi.org/10.1594/PANGAEA.909083
- Huang, H; Gutjahr, M; Eisenhauer, A et al. (2019): Authigenic Nd isotope composition of sediment core PS1599-3. https://doi.org/10.1594/PANGAEA.909080
- Huang, H; Gutjahr, M; Eisenhauer, A et al. (2019): Authigenic Nd isotope composition of sediment core PS1768-8. https://doi.org/10.1594/PANGAEA.909081
- Huang, H; Gutjahr, M; Eisenhauer, A et al. (2019): Authigenic PB isotope composition of surface sediments from the Southern Ocean. https://doi.org/10.1594/PANGAEA.909079