Deep Ocean Sensitivity to, and Role in the Transition from mid-Pliocene Warmth to Northern Hemisphere Glaciation

深海对上新世中期温暖向北半球冰川转变的敏感性及其作用

• 批准号: 1334691
• 负责人: Yair Rosenthal
• 金额: $ 34.86万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1334691&HistoricalAwards=false
• 关键词: Deep; Ocean; Sensitivity; Role; Transition

The warm mid-Pliocene, when on average global temperature was 2-3 degrees C warmer than at present, is within the range of the Intergovernmental Panel on Climate Change (IPCC) projections of global warming for the 21st century, and hence offers a good analog for future climate change. This work, conducted by a team of scientists from Rutgers University, will generate new geochemical proxy records (Mg/Ca, B/Ca, and Neodymium isotope composition) from deep sea sediment cores that will provide key constraints on spatial and temporal variations in the deep ocean hydrography in the Atlantic, Pacific, and Southern Oceans during the transition from the mid-Pliocene warm period to the onset of Northern Hemisphere glaciation (~2.5 to 3.5 million years before present). The new records will improve our understanding of the response of the deep ocean to the mid-Pliocene warmth and provide valuable insights into the ocean sensitivity to warmer/higher pCO2 conditions and during the subsequent transition to overall cooler climates in the Northern Hemisphere.In addition to better understanding links between the oceans and climate in a past analog to modern conditions, broader impacts include education and training of a female post-doctoral fellow and research opportunities for undergraduate students. The results will be presented in seminars, at national professional meetings, and incorporated into teaching curricula at undergraduate and graduate levels. The datasets generated in this research will be made available through the NOAA-NCDC web site.

当全球温度平均为2-3摄氏度时，温暖的中新世温暖的温度比目前的温​​度高2-3摄氏度，在21世纪全球变暖的政府间变化范围内（IPCC）投影范围内，因此为未来的气候变化提供了一个很好的模拟。这项工作由罗格斯大学（Rutgers University）的科学家团队进行，将产生新的地球化学代理记录（Mg/ca，b/ca和neododmium同位素组成），深海沉积物核心将为大海洋，太平洋和南部海洋中的深海洋范围内的深海变体提供关键的限制，从半球冰川（在现在之前约2.5至350万年）。新记录将提高我们对深海对中新世温暖的反应的理解，并为海洋对较温暖/较高的PCO2条件的敏感性以及随后向北半球的整体凉爽气候的敏感性提供宝贵的见解。除了在现代培训的情况下，对海洋和培训的培训，还包括对北半球的整体凉爽气候。 学生。结果将在研讨会，全国专业会议上介绍，并将其纳入本科和研究生级的教学课程中。本研究中生成的数据集将通过NOAA-NCDC网站提供。