Collaborative Research: The Role of Deep-Ocean Circulation in Greenhouse Climates: Integrating Numerical Simulations with Proxy Data of Water Mass Composition

合作研究：深海环流在温室气候中的作用：将数值模拟与水团组成的代理数据相结合

• 批准号: 0927946
• 负责人: Matthew Huber
• 金额: $ 5.57万
• 依托单位: Purdue 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=0927946&HistoricalAwards=false
• 关键词: Collaborative; Research; Role; Deep; Ocean

This research will address long-standing questions related to the formation of deep water masses in warm climate intervals and the role of the resulting circulation in maintaining weak large scale thermal gradients. The researchers aim to expand the current database of early Paleogene Pacific water mass composition reconstructions by using Neodymium (Nd) and Lead (Pb) isotopic records from Deep Sea Drilling Project (DSDP) and Ocean Drilling Program (ODP).The researchers will test three related hypotheses for deep-water circulation during the greenhouse climate of the early Cenozoic, as follows: 1) deep waters were convected in the high latitudes of the Pacific; 2) deep waters did not convect in the Eastern Tethys; and 3) the deep basins of the Atlantic and Pacific were not connected. The broader impacts involve the training and education of two doctoral students and substantive research experience for two undergraduate students. The researchers will contribute to teaching and outreach activities through the development of course materials and learning modules and will incorporate results into existing activities such as the Urbino Summer School in Paleoclimatology. Reconstructions will be disseminated to the community as base maps for future paleoclimatic modeling and proxy studies.

这项研究将解决与温暖气候区间深水团形成以及由此产生的环流在维持微弱的大尺度热梯度中的作用有关的长期存在的问题。 研究人员旨在利用深海钻探项目（DSDP）和海洋钻探计划（ODP）的钕（Nd）和铅（Pb）同位素记录来扩展当前古近纪早期太平洋水体成分重建的数据库。研究人员将测试三个新生代早期温室气候下深水环流的相关假说如下：1）太平洋高纬度地区有深水对流； 2）特提斯东部深水没有对流； 3）大西洋和太平洋的深海盆地并不相连。 更广泛的影响涉及两名博士生的培训和教育以及两名本科生的实质性研究经验。 研究人员将通过开发课程材料和学习模块为教学和外展活动做出贡献，并将成果纳入现有活动，例如乌尔比诺古气候学暑期学校。 重建结果将作为未来古气候建模和代理研究的底图分发给社区。