Pleistocene Intermediate- and Deep-Water Circulation in the SW Pacific sector of the Southern Ocean

我们打算研究西南太平洋中深水环流的冰期/间冰期变率。这项研究将集中于罗斯海附近形成的冰川深水和底水的作用。先前来自南大洋澳大利亚部分的研究结果将罗斯海描绘为太平洋深处通风的深水的主要冰川来源。为了验证这一假设，我们建议在南大洋西南太平洋部分900至4000米水深之间的中深水样带上五个新的图像核心。该环境为评估上层海洋分层之间的因果关系提供了极好的机会。中深水地层、循环和碳酸盐化学的变化。这些重建将基于浮游生物…底栖生物Mg/Ca、180和13C记录表明温度、盐度、营养物质和通风程度的变化。

We intend to investigate the glacial/interglacial variability of intermediate- and deep-water circulation in the SW Pacific. This study will focus on the role of glacial deep- and bottom-waters formed in the vicinity of the Ross Sea. Own previous results from the Australian sector of the Southern Ocean depict the Ross Sea as a major glacial source for deep-waters that ventilated the deep Pacific. To verify this hypothesis, we propose to take five new IMAGES cores on an intermediate to deep-water transect between 900 and 4.000 m water depth in the SW Pacific sector of the Southern Ocean. The setting provides an excellent opportunity to assess the causal relationships between upper-ocean stratification... and changes in intermediate- to deep-water formation, circulation and carbonate chemistry. These reconstructions will be based on planktonic... and benthic Mg/Ca, ¿ 180 and ¿ 13C records indicative of changes in temperature, salinity, nutrients and the degree of ventilation.