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

西赤道太平洋全球变化记录：过去300万年

• 批准号: 9017717
• 负责人: Wolfgang Berger
• 金额: $ 21.3万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017717&HistoricalAwards=false
• 关键词: Record; Global; Change; Western; Equatorial

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.

我们将利用从安通-爪哇高原的两个ODP点采集的1350个样本来研究过去300万年来生物生产力和海洋环流的变化。测量将包括：1)关键浮游和底栖有孔虫的保存和相对丰度；2)总体地层控制和垂直温度梯度的d-018；以及3)碳化学变化史的d-C13。尤其令人感兴趣的是，在关键的冰期-间冰期过渡期间，这些指数变化的性质。其他感兴趣的将是赤道西太平洋的上升流/生产力的历史，保存高峰和突然的冰川融化之间的联系，以及太平洋-大西洋深水时代的不对称历史。这将在“真实的”全球平均信号和在北大西洋测得的气候周期之间建立联系。