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| Russon, T.; Elliot, M.; Sadekov, A.; Cabioch, G.; Correge, T.; De Deckker, P.. |
| The position of the southern boundary of the Pacific warm pool is shown to have been stable since the early Pleistocene, based upon a planktic foraminiferal Mg/Ca-derived reconstruction of subtropical sea surface temperature in the Coral Sea. This contrasts with previous reconstructions showing warm pool contraction from the north and east and means that the early Pleistocene warm pool was more hemispherically asymmetric than its present configuration. The latter was not established until similar to 1Ma, supporting a strengthening of the northern Hadley Cell, which was not replicated in its southern counterpart, prior to the Mid-Pleistocene Transition. |
| Tipo: Text |
Palavras-chave: Pacific warm pool; Mg/Ca paleothermometry; Mid-Pleistocene Transition. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00144/25527/23672.pdf |
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| Russon, T.; Elliot, M.; Sadekov, A.; Cabioch, G.; Correge, T.; De Deckker, P.. |
| Reconstructions of subtropical southwest Pacific climate variability over the Pleistocene were derived from coupled planktic foraminiferal δ18O-Mg/Ca measurements taken from a southern Coral Sea sediment core. A clear shift from ∼40 kyr to ∼100 kyr modes of reconstructed glacial-interglacial sea surface temperature (SST) variability is seen over the mid-Pleistocene transition, and these fluctuations are shown to have remained coherent with the orbital obliquity cycle across the transition. The likely origin of this strong obliquity signal in subtropical southwest Pacific SST is shown to be the southern high latitudes, and comparison with existing SST reconstructions from the equatorial Pacific is consistent with the communication of the signal occurring... |
| Tipo: Text |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00141/25187/23293.pdf |
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