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| Xu, Jian; Kuhnt, Wolfgang; Holbourn, Ann; Regenberg, Marcus; Andersen, Nils. |
| We measured oxygen isotopes and Mg/Ca ratios in the surface-dwelling planktonic foraminifer Globigerinoides ruber (white s.s.) and the thermocline dweller Pulleniatina obliquiloculata to investigate upper ocean spatial variability in the Indo-Pacific Warm Pool (IPWP). We focused on three critical time intervals: the Last Glacial Maximum (LGM; 18-21.5 ka), the early Holocene (8-9 ka), and the late Holocene (0-2 ka). Our records from 24 stations in the South China Sea, Timor Sea, Indonesian seas, and western Pacific indicate overall dry and cool conditions in the IPWP during the LGM with a low thermal gradient between surface and thermocline waters. During the early Holocene, sea surface temperatures increased by similar to 3 degrees C over the entire... |
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| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00230/34131/33063.pdf |
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| Wang, Yiming V.; Leduc, Guillaume; Regenberg, Marcus; Andersen, Nils; Larsen, Thomas; Blanz, Thomas; Schneider, Ralph R.. |
| Different proxies for sea surface temperature (SST) often exhibit divergent trends for deglacial warming in tropical regions, hampering our understanding of the phase relationship between tropical SSTs and continental ice volume at glacial terminations. To reconcile divergent SST trends, we report reconstructions of two commonly used paleothermometers (the foraminifera G. ruber Mg/Ca and the alkenone unsaturation index) from a marine sediment core collected in the southwestern tropical Indian Ocean encompassing the last 37,000 years. Our results show that SSTs derived from the alkenone unsaturation index (U-37(K)) are consistently warmer than those derived from Mg/Ca by similar to 2-3 degrees C except for the Heinrich Event 1. In addition, the initial... |
| Tipo: Text |
Palavras-chave: Sea surface temperature; Tropical Indian Ocean; Last Deglacial. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00291/40174/39037.pdf |
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