Solar Wind-Magnetosphere-Ionosphere Coupling During Northward Interplanetary Magnetic Field: How do Transpolar Arcs Affect the Global Ionospheric Electrodynamics and vice versa?

该项目将研究太阳风条件对孤立的高纬度极弧（也称为θ极光）的影响，并确定与这些弧相关的电离层中的局部和全球等离子体流。该项目将检查跨极弧的电动力学特性，并将其与相应的87个事件联系起来，在这些事件中，国防气象卫星计划（DMSP） F13卫星测量了与跨极弧相关的带电粒子沉淀。卫星测量将用于确定：(1)沉淀粒子区域的空间范围，(2)静电势分布，(3)交叉轨道（向太阳/反太阳方向）水平电离层等离子体流，(4)沉淀离子和电子平均能量和通量，以及(5)场向电流。除了卫星测量之外，超级双极光雷达网（superdamn）的数据将用于确定与超极弧相关的电离层对流模式的细节。这个项目将研究当行星际磁场（IMF）指向北方时，太阳风、地球磁层和电离层之间的能量耦合。在向北的国际货币基金组织期间，极光弧经常形成并将极帽分成两个明显分开的区域。该项目旨在了解不同区域电磁耦合的本质以及它们是如何演变的。

This project will study the influence of solar wind conditions on isolated high-latitude transpolar arcs (also known as theta aurora) and determine the local and global plasma flows in the ionosphere associated with the arcs. The project will examine the electrodynamic characteristics of the transpolar arcs and relate them to the corresponding A total of 87 events where Defense Meteorological Satellite Program (DMSP) F13 satellite has measured precipitating charged particles associated with transpolar arcs. The satellite measurements will be used to determine: (1) the spatial extent of the precipitating particle regions, (2) the electrostatic potential distribution, (3) the cross-track (sunward/antisunward) horizontal ionospheric plasma flow, (4) precipitating ion and electron average energies and fluxes, and (5) field-aligned currents. In addition to the satellite measurements, data from the Super dual Auroral Radar Network (SuperDARN) will be used to determine the details of the ionospheric convection pattern associated with the transpolar arcs. This project will examine the energy coupling between the solar wind, Earth's magnetosphere, and the ionosphere during periods when the interplanetary magnetic field (IMF) is pointing northward. During northward IMF, auroral arcs often form and divide the polar cap into two apparently separate regions. The project seeks to understand the nature of the electromagnetic coupling of the different regions and how they evolve.