The Record of Global Change in the Western Equatorial Pacific: The Last 3 Million Years

在过去的300万年里，生物生产力和海洋环流的变化将使用从安通-爪哇高原的两个ODP地点采集的1350个样本进行研究。测量将包括：1)主要浮游生物和底栖有孔虫的保存和相对丰度；2)d-018用于整体地层控制和垂直温度梯度；3) d-C13是碳化学变化的历史。特别令人感兴趣的是这些指数在冰期-间冰期临界过渡期间变化的性质。其他兴趣点将是西赤道太平洋上升流/生产力的历史，保存峰值与突然冰融化之间的联系，以及深水时代太平洋-大西洋不对称的历史。将把“真实的”全球平均信号与在北大西洋测量到的气候周期联系起来。

Variations in the biologic productivity and ocean circulation over the last 3 million years will be studied using 1350 samples taken from two ODP sites on the Ontong-Java Plateau. Measurements will include 1)preservation and relative abundances of key planktonic and benthic foraminifera; 2)d-018 for overall stratigraphic control and vertical temperature gradients; and 3) d-C13 for history of changes in carbon chemistry. Of particular interest will be the nature of the variations in these indices during critical glacial- interglacial transitions. Other points of interest will be the history of upwelling/productivity in the western equatorial Pacific, the link between preservation spikes and abrupt ice melting, and the history of Pacific-Atlantic assymetry in the age of deep water. The link will be made between "true" global average signal and climatic cycles measured in the North Atlantic.