Oceanic Paleochemistry and Deep Ocean Variability

海洋古化学和深海变化

• 批准号: 9402198
• 负责人: Edward Boyle
• 金额: $ 63.63万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9402198&HistoricalAwards=false
• 关键词: Oceanic; Paleochemistry; Deep; Ocean; Variability

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.

波义耳9402198 随着全世界进行良好镉测量的实验室数量的增加，预计全球镉数据库将迅速扩大，以评估化学变化在大气CO2变化中的作用以及海洋环流对全球气候变化的影响。 该研究项目将集中研究全球范围内的一些特定问题。 特别是，它将（1）通过研究高沉积速率岩心中的有孔虫微量元素，单个个体，（寻找深水化学的“模式”，最重要的是，深海珊瑚），这应允许对深水化学进行非常高分辨率的观察;（2）通过对西北太平洋岩心的详细研究和简单的海洋地球化学模型，探讨13 C、Cd和Ba古化学信号差异的根源;（3）继续从世界各大海洋的主要海盆中生成长时间高分辨率古地球化学记录，以探索深海化学、通过研究不同环境的岩心顶部、高沉积速率岩心中的单个底栖生物标本，并比较不同的方解石和文石底栖生物物种以及深海珊瑚，继续测试作为古地球化学重排的甲酸盐的准确性。