Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 Cores

该提案旨在根据IODP exp. 342 （Newfoundland Drifts）期间钻探的岩心所获得的有孔虫的同位素组成，为始新世建立一个高分辨率、天文校正的时间序列。该系列将填补旋回地层记录的空白（始新世空白），形成完整的轨道分辨新生代记录。这是exp. 342的主要目标之一。这项工作还将能够检查始新世期间轨道尺度的响应和碳循环的敏感性，并通过与太平洋获得的数据进行比较，确定诸如CCD加深之类的事件是否在全球范围内发生。始新世是气候研究的一个特别关键的时期，因为它跨越了早新生代温室和晚新生代冰窖之间的时间。始新世是气候研究的一个特别关键的时期，因为它跨越了早新生代温室和晚新生代冰窖之间的时间。这项工作提供的信息将有助于在地球历史上一个特别关键的时期限制和评估全球气候变化的原因。

This proposal seeks to develop a high-resolution, astronomically-tuned time series for the Eocene based on the isotopic compositions of foraminfera obtained from cores drilled during IODP exp. 342 (Newfoundland Drifts). This series will fill a gap (Eocene Gap) in the cyclostratigraphic record and enable the development of a complete orbitally-resolved Cenozoic record. This is one of the primary objectives of exp. 342. This work will also enable the examination of orbital-scale response and sensitivity of the carbon cycle during the Eocene and by comparison with data obtained in the Pacific Ocean, determine whether or not events such as the deepening of the CCD were global in extent. The Eocene is a particularly critical time for climate studies as it spans the time between the early Cenozoic greenhouse and the later Cenozoic icehouse. The Eocene is a particularly critical time for climate studies as it spans the time between the early Cenozoic greenhouse and the later Cenozoic icehouse. The information provided by this work will help to constrain and evaluate the causes of global climate change at a particularly crucial time in Earth history.