Career: Geochemical Approaches to Oceanography and Climatology: A Plan for Research and Education

职业：海洋学和气候学的地球化学方法：研究和教育计划

• 批准号: 9733688
• 负责人: Daniel Schrag
• 金额: $ 45.58万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733688&HistoricalAwards=false
• 关键词: Career; Geochemical; Approaches; Oceanography; Climatology

9733688 Schrag This award supports a program of research, teaching and curriculum development focused on questions regarding the history of oceans and climate over a range of timescales. In one project, we will examine the last several decades of ocean circulation in the tropical Pacific. Using corals as stationary monitors of surface ocean radiocarbon content, we will examine how bomb-produced radiocarbon has penetrated into the surface ocean, and then has been redistributed by upwelling and the movement of surface currents, essentially adding a time dimension to the information gained from surface water sampling by the GEOSECS program. The second project is concerned with reconstructing interannual variability in the position of the Indonesian Low Pressure System for windows of time several thousand years ago, with the objective of better understanding how ENSO responds to changes in the mean climate state. We will collect fossil corals from uplifted coral reefs in Indonesia from locations where oxygen isotope records from modern corals show strong correlation with ENSO. The Holocene timeseries we produce will be compared with predictions from ocean circulation models. For the teaching component, the award will support a new initiative which provides students in government and public policy exposure to research in climatology as a participant in Schrag's research group.

9733688施拉格该奖项支持一个研究、教学和课程开发项目，重点关注一系列时间尺度上的海洋和气候历史问题。在一个项目中，我们将研究热带太平洋过去几十年的海洋环流。使用珊瑚作为海洋表面放射性碳含量的固定监测器，我们将研究核弹产生的放射性碳是如何渗透到海洋表面的，然后通过上升流和表面洋流的运动重新分布，本质上是给GEOSECS项目从地表水采样中获得的信息增加了一个时间维度。第二个项目涉及重建几千年前印尼低压系统位置的年际变化，目的是更好地了解ENSO如何响应平均气候状态的变化。我们将从印度尼西亚凸起的珊瑚礁中收集珊瑚化石，这些珊瑚礁的现代珊瑚氧同位素记录显示与ENSO有很强的相关性。我们得出的全新世时间序列将与海洋环流模型的预测结果进行比较。在教学方面，该奖项将支持一项新的倡议，让政府和公共政策专业的学生作为施拉格研究小组的参与者接触气候学研究。