Age determination of sediment cores from the southern South Atlantic ...
Two sediment sequences recovered close to, and south of, the present Polar Front (50°, 53°S) in the Atlantic sector of the Southern Ocean were analysed in order to evaluate the environmental evolution of the Southern Ocean surface over the last deglaciation and the Holocene. Our reconstruction is ba...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2004
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.712953 https://doi.pangaea.de/10.1594/PANGAEA.712953 |
| Summary: | Two sediment sequences recovered close to, and south of, the present Polar Front (50°, 53°S) in the Atlantic sector of the Southern Ocean were analysed in order to evaluate the environmental evolution of the Southern Ocean surface over the last deglaciation and the Holocene. Our reconstruction is based on radiocarbon-dated records of diatom-based sea surface temperature and sea-ice proxies and planktic foraminiferal stable isotopes. The onset of the deglacial warming and gradual southward retreat of the winter sea-ice field between 18 and 17 cal kyr BP, occurrence of a thermal reversal centered at ca. 13 cal kyr BP (Antarctic Cold Reversal, or ACR), and early Holocene occurrence of the “climatic optimum” well correlate with climatic reconstructions available from the Indian Southern Ocean and from Antarctic ice cores. Time correspondence of Southern Ocean warming and Heinrich event 1 in the North Atlantic is compatible with the transmission of the climate signal from the Northern to the Southern Hemisphere ... : Supplement to: Bianchi, Cristina; Gersonde, Rainer (2004): Climate evolution at the last deglacial: the role of the Southern Ocean. Earth and Planetary Science Letters, 228(3-4), 407-424 ... |
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