Global Electrodynamics of the Aurora during Northward Interplanetary Magnetic Field (IMF) and Associated Ionosphere-Magnetosphere Interactions

跨极光弧是一种有趣的现象，至今尚未完全解释。它与复杂的磁层结构和动力学以及复杂的磁层-电离层耦合有关，这是向北的行星际磁场条件的特征。这是一个为期5年的数据分析项目，除了利用高级磁层-电离层耦合模型的模型结果外，还利用极地、图像和DMSP卫星、太阳风监测仪和SuperDARN雷达网的数据集，以处理关于这一现象的一些悬而未决的问题。拟议项目的三个具体目标是：(1)确定跨极弧与同时发生的极光亚暴等其他极光现象之间的关系；(2)确定跨极弧与两个半球的电离层对流模式、沉淀粒子和场向电流的关系；(3)调查跨极弧演化过程中的磁层结构和动力学。

Transpolar auroral arcs are an intriguing phenomenon that has not yet been fully explained. It relates to the complicated magnetosphere configuration and dynamics and complex magnetosphere-ionosphere coupling that characterize northward interplanetary field conditions. This is a 5-year data analysis project utilizing data sets from the POLAR, IMAGE and DMSP satellites, solar wind monitors and the SuperDARN radar network in addition to model results from advanced magnetosphere-ionosphere coupling models to address a number of outstanding questions on this phenomenon. Three specific objectives of the proposed project are: (1) Determine the relationship between transpolar arcs and other auroral phenomena that occur simultaneously, such as auroral substorms; (2) Determine the relation of transpolar arcs with ionospheric convection patterns, precipitating particles, and field-aligned currents in both hemispheres; and (3) Investigate the magnetospheric structure and dynamics during transpolar arc evolution.The broader impacts of the project includes graduate student participation and the promotion of women in science.