Accomplishment Based Renewal: Hydrologic History of the Indo-Pacific-Warm Pool During the Last 25,000 Years

基于成就的更新：过去 25,000 年印度洋-太平洋-暖池的水文历史

• 批准号: 1060743
• 负责人: Delia Oppo
• 金额: $ 57.5万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1060743&HistoricalAwards=false
• 关键词: Accomplishment; Based; Renewal; Hydrologic; History

How the tropical hydrologic cycle is responding and will respond to anthropogenic perturbations is unclear. Records of past change recorded in marine sediments offer one important avenue to explore how tropical climate responds to changes in a range of surface boundary conditions, and the mechanisms that cause these changes.A researcher from the Woods Hole Oceanographic Institution in Massachusetts will examine the response of the tropical hydrologic cycle to a range of boundary conditions during the last 25,000 years, focusing on the Indo-Pacific region. This geographic area includes the Indo-Pacific Warm Pool (IPWP), the largest reservoir of warm surface water on earth, the major source of heat for the global atmosphere, and a location of deep atmospheric convection and heavy rainfall. Previous work by this researcher has shown that small variations in sea surface temperature of the IPWP can perturb planetary scale atmospheric circulation and atmospheric heating globally. This project will generate records of hydrologic change from core sites within the IPWP using compound-specific hydrogen and carbon isotopes of terrestrial long-chain leaf-wax fatty acids. Within the time period of interest, there will be a particular focus on abrupt, millennial-scale changes (Heinrich Event 1 and the Younger Dryas) and the last 2,000 years. This project builds on a large body of previous work carried out by this researcher and her colleagues, and continues collaborations with organic geochemists and climate modelers for a robust and multi-faceted approach to understanding the tropical hydrologic cycle. Funding will support a postdoctoral researcher, and provide opportunities for undergraduate and high school students involvement in marine research.

热带水文循环的响应方式并将对人为扰动做出反应尚不清楚。海洋沉积物中记录的过去变化的记录为探索热带气候如何应对一系列边界条件的变化以及引起这些变化的机制的反应。该地理区域包括印度太平洋暖游泳池（IPWP），地球上最大的温暖地表水库，全球大气的主要热源，以及深度大气对流和大降雨的位置。该研究人员的先前工作表明，IPWP海面温度的较小变化可以扰动行星尺度大气环流和全球大气加热。该项目将使用IPWP内的核心地点的水文变化记录，并使用陆链长链叶蜡脂肪酸的复合特异性氢和碳同位素。在兴趣期间，将特别关注突然的千禧一代变化（Heinrich事件1和年轻的Dryas）和过去的2000年。该项目建立在这位研究人员及其同事进行的大量以前的工作的基础上，并继续与有机地球化学主义者和气候建模者合作，采用了强大而多方面的方法来理解热带水文周期。资金将支持博士后研究人员，并为本科和高中生参与海洋研究提供机会。