A depth transect of sedimentary 231Pa/230Th in the western Atlantic since the last ice age

末次冰期以来西大西洋沉积层 231Pa/230Th 深度横断面

• 批准号: 0902985
• 负责人: Jerry McManus
• 金额: $ 39.92万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902985&HistoricalAwards=false
• 关键词: depth; transect; sedimentary; 231Pa; 230Th

The PI will measure late glacial through Holocene 231Pa/230Th in a depth transect of cores on the Blake Ridge in the western North Atlantic, with the objective of understanding the mechanisms that control these radioisotopes and their relationship to sediment flux and deposition. The PI argues that this would allow a better use of the Pa-Th method to evaluate the changes in the Atlantic Meridional Overturn Circulation between glacial times and the present. Currently the data relevant to this problem are scattered and thus difficult to interpret. Broader impacts: In addition to promoting better understanding of climate and ocean circulation systems the project will also support teaching, training and learning. A strong outreach element is also a part of the project.

PI 将在北大西洋西部布莱克海岭的岩心深度横断面中测量全新世 231Pa/230Th 的晚冰期，目的是了解控制这些放射性同位素的机制及其与沉积物通量和沉积的关系。 PI 认为，这将允许更好地使用 Pa-Th 方法来评估冰期和现在之间大西洋经向翻转环流的变化。目前与该问题相关的数据比较分散，因此难以解释。更广泛的影响：除了促进更好地了解气候和海洋环流系统之外，该项目还将支持教学、培训和学习。强大的外展元素也是该项目的一部分。