CAREER: Full-vector Characterization of the recent (0-5 Myr) Geomagnetic field using novel magnetic field recorder

职业：使用新型磁场记录仪对最近（0-5 Myr）地磁场进行全矢量表征

• 批准号: 2237807
• 负责人: Courtney Sprain
• 金额: $ 69.43万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2028-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2237807&HistoricalAwards=false
• 关键词: CAREER; Full; vector; Characterization; recent

Earth’s magnetic field acts as a shield that protects Earth from dangerous magnetic storms and cosmic radiation which have the potential to damage technical infrastructure, strip away Earth’s atmosphere, and ultimately harm life. Due to its importance to habitability and modern technical infrastructure, it is critical to understand how Earth’s magnetic field has varied through Earth’s past, in addition to how it might change in the future. To do this, it is necessary to characterize the spatial and temporal variations of the magnetic field using paleomagnetism, in which ancient records of the field are measured from rocks. Due to a sparsity of paleomagnetic data and gaps in paleomagnetic education and training, our ability to understand past behavior and predict future behavior is hampered. This project aims to improve the characterization of geomagnetic field behavior by filling in important data gaps in the current paleomagnetic record using a novel recorder of geomagnetic field behavior, clinkers, or rocks baked and burned by coal seam fires from the Powder River Basin, USA. This aim will be further enhanced through the development of a new paleomagnetism general education course and experiential learning research experience on clinkers as part of the University of Florida’s (UF) Quest program, and the development of a paleomagnetism-focused workshop for high-school age 4-H club members as a part of UF Extension Services’ program, 4-H University. These programs will educate a broad and diverse audience in the fields of paleomagnetism and Earth Science, while simultaneously attracting new students to Earth Science degrees, paleomagnetic research, and ultimately the STEM workforce.Despite being a fundamental feature of our planet, our understanding of Earth’s magnetic field is incomplete. Currently, there are many gaps in the state of knowledge including: 1) what drives the magnetic field? 2) what causes magnetic reversals? and 3) how does the magnetic field vary spatially? These gaps in knowledge are further exacerbated by an education gap. Paleomagnetism can provide insight into multiple geoscience disciplines, yet as a topic it typically receives little attention in geoscience training. This impacts the ability of the geoscience community to understand paleomagnetic research in addition to the ability to fill in critical gaps in understanding of the magnetic field. What is needed to fill in these critical gaps is both more high-quality full-vector (direction and intensity) paleomagnetic data in addition to a trained workforce to collect and analyze these data. The aim of this project is to fill these needs by improving the characterization of recent (0–5 Myr) geomagnetic field behavior using a novel recorder of geomagnetic field behavior, clinkers. Clinkers, rocks baked and burned by coal seam fires, are an exciting new candidate for obtaining high-quality full-vector magnetic records as they occur throughout the world, are located in regions lacking magnetic data, can be reliably dated, and are reliable full-vector magnetic recorders. In this project, state-of-the-art paleomagnetic and geochronologic techniques will be utilized, generating a semi-continuous, high-resolution, full-vector record of magnetic field variations for Quaternary to Pliocene (0–5 Myr) age clinker deposits from the Powder River Basin (PRB), USA. This research is the first step in building a reliable methodology to expand work on clinker deposits outside of the PRB. The education and outreach components of this project will train the next generation of paleomagnetists, broaden the understanding of paleomagnetic research within the geosciences and the general population, and enhance the participation of underrepresented groups in the field. This project is an early step in a continuum of research and education that will lead to an improved global characterization of the magnetic field. More generally, this project addresses science priority question one, “How is Earth’s internal field generated?”, released in the National Academies decadal report for NSF-EAR.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球的磁场充当保护地球免受危险的磁场和宇宙辐射的盾牌，这些磁场有可能损害技术基础设施，剥夺地球大气层并最终损害生命。由于它对可居住性和现代技术基础设施的重要性，重要的是要了解地球的磁场在地球的过去如何变化，除了将来如何变化。为此，有必要使用古磁性来表征磁场的空间和临时变化，其中从岩石中测量了该田间的古老记录。由于古磁数据和古磁教育和培训中的差距的稀疏性，我们了解过去的行为和预测未来行为的能力受到阻碍。该项目旨在通过使用新颖的地磁田地行为，熟料或岩石在美国粉末河河流域烘烤和燃烧的新型录音机来填补当前古磁记录中的重要数据差距，从而改善地磁场行为的表征。作为佛罗里达大学（UF）Quest计划的一部分，通过开发新的古磁性通识教育课程和专家学习研究经验，并开发针对高中4-H俱乐部成员的高中生俱乐部成员，作为UF Extention SpeenT Service Services的一部分，将进一步增强该目标。这些计划将在古磁和地球科学领域教育广泛而多样的受众，同时吸引新生获得地球科学学位，古磁研究以及最终的STEM劳动力。尽管是我们星球的基本特征，但我们对地球磁场的理解是不完整的。当前，知识状态存在许多差距，包括：1）什么驱动磁场？ 2）是什么导致磁反转？ 3）磁场如何在空间上变化？教育差距进一步加剧了知识中的这些差距。古磁性可以为多个地球科学学科提供洞察力，但是作为一个话题，它通常在地球科学培训中很少受到关注。这影响了地球科学界了解古磁研究的能力，除了能够填补对磁场的关键空白的能力。填补这些关键差距所需的是，除了训练有素的劳动力以收集和分析这些数据外，还需要更高质量的全矢量（方向和强度）古磁数据。该项目的目的是通过改善使用新型的地磁田地行为记录器，熟料来改善最近（0-5 Myr）地磁场行为的表征来满足这些需求。熟料是由煤缝火烘烤和燃烧的岩石，是一个令人兴奋的新候选人，可以在世界各地获得高质量的全矢量磁记录，位于缺乏磁性数据的地区，可以是可靠的，并且是可靠的全矢量磁记录。在这个项目中，将利用最先进的古磁和年代学技术，从而产生半新世至季循环（0-5 Myr）年龄熟料的半连续，高分辨率，全矢量记录，来自美国粉末河盆地（PRB），美国，美国，美国。这项研究是建立可靠方法的第一步，以扩大PRB之外的熟料沉积物的工作。该项目的教育和外展成分将培训下一代古磁主义者，扩大对地球科学和一般人群中古磁研究的理解，并增强代表性不足的群体在该领域的参与。该项目是研究和教育连续的早期一步，将改善磁场的全球表征。更一般而言，该项目解决了科学优先问题一号，“地球内部领域是如何产生的？”，该奖项在美国国家学院的decadal decadal报告中发表。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响标准通过评估来获得的支持。