Links Between the Geomagnetic Field, Climate Change, and Orbital Cycles as Recorded in Quaternary Sediments From the North Atlantic

北大西洋第四纪沉积物中记录的地磁场、气候变化和轨道周期之间的联系

• 批准号: 0549676
• 负责人: Gary Acton
• 金额: $ 20万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-03-01 至 2010-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0549676&HistoricalAwards=false
• 关键词: Links; Between; Geomagnetic; Field; Climate

The possible link between variations in the Earth's geomagnetic field and climate change events and/or Earth's orbital variations is the subject of debate. Using core samples from 4 ODP and IODP sites in the North Atlantic, researchers plan to conduct high resolution magnetic studies over particularly the last 1 M.y., but back to 2.4 Ma at the site drilled on IODP Expedition 306. By combining their results with existing isotopic data and new stable isotope measurements in core intervals characterized by significant magnetic excursions, the researchers will refine chronologies, sample intervals of magnetic stability, polarity reversal, and anomalous excursions, and provide a direct test for the hypothesized link between geomagnetic field changes and climate change. Broader impacts include the potential of this research to fundamentally alter understanding of the links among orbital variations, climate change, and geomagnetic field characteristics, involvement of students, and local outreach to elementary school classrooms.

地球地磁场的变化与气候变化事件和/或地球轨道变化之间的可能联系是争论的主题。利用北大西洋4个ODP和IODP地点的岩心样本，研究人员计划进行高分辨率的磁研究，特别是在过去的1m，但回到2.4 Ma，在IODP探险306钻探的地点。通过将他们的结果与现有的同位素数据和新的稳定同位素测量结果结合起来，研究人员将改进年表，磁稳定性，极性反转和异常漂移的样本间隔，并为地磁场变化与气候变化之间的假设联系提供直接测试。更广泛的影响包括这项研究有可能从根本上改变对轨道变化、气候变化和地磁场特征之间联系的理解，学生的参与，以及当地小学课堂的推广。