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

我们打算调查西南太平洋中、深水环流的冰期/间冰期变异性。这项研究将侧重于罗斯海附近形成的冰川深水和底层水的作用。我们之前在南大洋澳大利亚部门的研究结果显示，罗斯海是影响太平洋深处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区段水深900-4.000米的中至深水断面上拍摄5个新的图像岩芯。这一背景为评估上层海洋层化之间的因果关系提供了一个极好的机会。以及中-深水地层、循环和碳酸盐化学的变化。这些重建将以浮游生物为基础。底栖生物的镁/钙、180和13C记录表明了温度、盐度、营养物质和通风度的变化。

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.