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

我们打算调查在西南太平洋的中层和深层水循环的冰川/间冰期的变化。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。根据澳大利亚在南大洋的研究结果，罗斯海是为太平洋深层提供通风的深水的主要冰川源。为了验证这一假设，我们建议在南大洋西南太平洋部分900和4.000米水深之间的一个中间到深水断面上取5个新的Idea岩心。该设置提供了一个很好的机会来评估上层海洋分层之间的因果关系。以及中层至深水形成、循环和碳酸盐化学的变化。这些重建将基于...底栖Mg/Ca、<$180和<$13 C记录表明温度、盐度、营养物和通风程度的变化。

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.