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.

这项研究将解决长期存在的问题，即在温暖的气候间隔中形成深水团，以及由此产生的环流在维持弱的大尺度热梯度方面的作用。 研究人员的目标是利用深海钻探计划（DSDP）和大洋钻探计划（ODP）的钕（Nd）和铅（Pb）同位素记录来扩展目前古近纪早期太平洋水体组成重建的数据库。研究人员将测试新生代早期温室气候期间深水环流的三个相关假设，如下：1）太平洋高纬度地区的深层沃茨对流; 2）东特提斯的深层沃茨不对流; 3）大西洋和太平洋的深层盆地不相连。 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。 研究人员将通过编写课程材料和学习模块，促进教学和外联活动，并将成果纳入乌尔比诺古气候学暑期学校等现有活动。 重建图将作为未来古气候建模和代用研究的基础地图分发给社区。