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| Pena, L. D.; Goldstein, S. L.; Hemming, S. R.; Jones, K. M.; Calvo, E.; Pelejero, C.; Cacho, I.. |
| The Southern Ocean is increasingly recognized as a key player in the general ocean thermohaline circulation and the global climate system during glacial interglacial transitions. In particular, the advection of Southern Ocean intermediate waters (SOIW), like Antarctic Intermediate Water and Sub-Antarctic Mode Water, to the Eastern Equatorial Pacific (EEP), through a so-called "oceanic tunnelling" mechanism, is an important means for rapid transfer of climatic signals (such as heat, fresh water, salt, and chemical species) from high-to-low latitudes. However, information on how intermediate water advection rates changed in the past, and particularly during deglaciations, is fragmentary. We present new results for Nd isotopes (epsilon(Nd)) in cleaned... |
| Tipo: Text |
Palavras-chave: Neodymium isotopes; Planktonic foraminifera; Intermediate water masses; Eastern Equatorial Pacific; Equatorial Undercurrent; Southern Ocean. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00264/37543/36928.pdf |
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| Pelejero, C.; Calvo, E.; Barrows, T. T.; Logan, G. A.; De Deckker, P.. |
| Alkenone palaeothermometry has demonstrated a wide spatial and temporal applicability for the reconstruction of sea-surface temperatures (SST). Some oceanic realms, however, remain poorly studied. We document U-37(K) index data for two sediment cores retrieved from the South Tasman Sea, one west of New Zealand (SO136-GC3) and the other southeast of Tasmania (FR1/94-GC3), extending back 280 kyr BP for the former and 460 kyr BP for the latter. High climatic sensitivity on orbital time scales is observed at both locations, particularly west of New Zealand, where typical glacial/interglacial SST amplitudes always span more than 7 degrees C. Southeast of Tasmania, SST amplitudes are lower in amplitude (4.3 to 6.9 degrees C) with the exception of Termination IV,... |
| Tipo: Text |
Palavras-chave: SST; South Pacific Ocean; Molecular biomarker; Late Pleistocene; U-37(K); Marine Isotopic Stage 11. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00234/34530/33425.pdf |
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