Oceanic Paleochemistry and Deep Ocean Variability

9402198博伊尔随着世界各地进行良好的镉测量的实验室数量的增加，预计现有的全球镉数据库将迅速扩大，用于评估化学变化在大气二氧化碳变化中的作用以及海洋环流对全球气候变化的影响。这一研究项目将集中在这一全球范围内的一些特定问题上。特别是，它将(1)通过研究高沉积速率岩心、单个个体中的有孔虫微量元素(寻找深水化学的“模式”，最重要的是深海珊瑚)，确定深海化学成分变化的速度有多快；(2)通过对西北太平洋岩心的详细研究，以及通过简单的海洋地球化学模型，研究13C、Cd和Ba古化学信号之间的差异来源；(3)继续从世界海洋的关键盆地产生长而高分辨率的古化学记录，以探索深海化学、大气二氧化碳和全球气候之间的光谱联系；以及(4)通过研究不同环境的岩心顶部、高沉积速率岩心的单个底栖生物标本，以及比较不同的钙质和文石底栖生物物种和深海珊瑚，继续检验作为古化学记录的甲壳虫的准确性。

9402198 BOYLE With an increase in the number of laboratories throughout the world making good Cd measurements, it is anticipated that there will be a rapid expansion of available global Cd database in which to evaluate the role of chemical changes in the changing atmospheric CO2 and the influence of ocean circulation on global climate change. This research project will concentrate on some particular issues within this global scale context. Specially, it will (1) Establish how rapidly deep ocean chemical composition can change by studying foraminiferal trace elements in high deposition rate cores, single individuals (to search for "modes" of deepwater chemistry, and most importantly, deep sea corals) which should allow for a very high resolution view of deepwater chemistry; (2) Examine the origins of differences between 13C, Cd and Ba paleochemical signals from detailed studies of Northwest Pacific cores and through simple ocean geochemical models; (3) Continue to generate long high resolution paleochemical records from key basins of the world oceans in order to explore the spectral links between deep ocean chemistry, atmospheric PCO2, and global climate; and (4) Continue testing of forminiferal accuracy as paleochemical reorders by studying core tops from diverse environments, individual benthic specimens from high sedimentation rate cores, and comparing different calcitic and aragonitic benthic species and deep sea corals.