Collaborative Research: Developing a Continuous Reconstruction of Tropical Pacific Climate Over the Last 500-700 Years: Analysis of Massive Porites Corals from American Samoa

合作研究：对过去 500-700 年热带太平洋气候进行持续重建：对美属萨摩亚大量滨珊瑚的分析

• 批准号: 1203783
• 负责人: Braddock Linsley
• 金额: $ 23.75万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1203783&HistoricalAwards=false
• 关键词: Collaborative; Research; Developing; Continuous; Reconstruction

Records of baseline ocean-atmosphere variability provide critical context for understanding changes in mean climate state. However, ocean-atmosphere variability is not well understood during the time between the anomalous Medieval Warm Period/Little Ice Age and the present (the last ~500-800 years). This project-- a collaboration between Columbia University's Lamont Doherty Earth Observatory and Stanford University-- will develop a proxy record of variability in the western tropical Pacific over the past 500+ years. Coral cores collected from giant Porites colonies in Ta'u Island, American Samoa, will be analyzed for interannual- to centennial-scale variability in temperature and salinity (Sr/Ca and oxygen isotopes), indicating changes in the extent of the South Pacific Convergence Zone.The researchers will partner with the National Park of American Samoa to construct an exhibit illustrating the use of long coral cores to study environmental change. This exhibit, displayed at the park's information center, will include Ta'u coral core material and data associated with this study. The project will support a post-doctoral researcher at Lamont and a graduate student at Stanford.

基线海洋 - 大气变异性的记录为理解平均气候状态的变化提供了关键背景。但是，在异常的中世纪温暖时期/小冰河时代与现在（最后〜500 - 800年）之间的时间（最后〜500 - 800年）之间，海洋 - 大气变异性尚未得到很好的了解。该项目 - 哥伦比亚大学的拉蒙特·多尔蒂（Lamont Doherty）地球天文台与斯坦福大学（Stanford University）之间的合作，将在过去500多年中在西部热带太平洋地区建立可变性的代理记录。将分析从美国萨摩亚大岛巨型孔雀菌群收集的珊瑚岩心，将分析温度和盐度的温度和盐度（SR/CA和氧同位素）的年度至百年尺度的变化，表明南太平洋融合区的范围变化。该展览会在公园的信息中心展出，将包括与本研究相关的Ta'u Coral Core材料和数据。该项目将支持Lamont的博士后研究人员和斯坦福大学的研究生。