NSFGEO-NERC: The history of the Earth's magnetic field strength over the last five million years: Filling in the southern hemisphere gap

尽管取得了重大进展，但关于平均场强及其随时间变化的基本问题仍然存在。我们对磁场具有持续的半球不对称的假设特别感兴趣，这一想法得到了长期（5myr）数据汇编的支持。我们在此提出了一种多管齐下的方法，以确定最佳的实验/分析策略，并结合新的采样任务（针对南半球），以填补全球数据库中的空白。我们还将对现有数据集进行新的数据分析，以尽可能获得古代磁场随时间变化的最佳图像。

Despite significant progress, fundamental questions regarding the average field strength and its variation through time remain. We are particularly interested in the hypothesis that the magnetic field has a persistent hemispheric asymmetry, an idea supported by long-term (5 Myr) data compilations. We propose here a multi-pronged approach of determining the optimum experimental/analysis strategy combined with new sampling missions (targeting the Southern Hemisphere)in order to fill in gaps in the global database. We will also undertake a new data analysis of existing data sets to obtain the best possible picture of the ancient magnetic field over time.