Testing the Traditional Paradigm of the Sub-Auroral Polarization Stream During Storm and Non-storm Conditions

亚极光偏振流（SAPS）是位于黄昏-午夜扇区极光椭圆赤道方向的向西向等离子体流区域。该项目旨在将对SAPS的理解从“传统范式”转变为更广泛的描述，包括所有类似SAPS的流动，包括发生在地磁“平静”时期的流动。这项工作利用美国国家科学基金会（NSF）的资产和基础设施，以促进对磁层-电离层耦合的理解。这一主题是大气区域耦合、能量学和动力学（CEDAR）和地球空间环境建模（GEM）方案目标的共同点，因此这项工作将在热层、电离层和磁层社区之间架起桥梁。该项目的科学性与《国家空间气象行动计划》制定空间气象事件基准的目标有关。这个项目资助一个早期的职业科学家，并从事暑期研究的本科生。该方法使用了几个开放的数据源，包括SuperDARN，GPS TEC（全球定位系统总电子含量），高分辨率AMPERE（活动磁层和行星电动力学响应实验）和POES（极地运行环境卫星）数据。该项目将收集R1/R2场向电流，极光边界和中纬度槽的特点，为每次发生的SAP样流，然后统计检查他们的地球物理参数。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

Sub-auroral polarization streams (SAPS) are regions of westward directed plasma flows located equatorward of the auroral oval in the dusk-midnight sector. This project aims to transform the understanding of SAPS from the "traditional paradigm" to a broader description that encompasses all SAPS-like flows including those occurring during geomagnetically "quiet" times. This work leverages the National Science Foundation (NSF) assets and infrastructure to advance understanding on magnetosphere-ionosphere coupling. This topic is common to both Coupling, Energetics and Dynamics of Atmospheric Regions (CEDAR) and Geospace Environment Modeling (GEM) programmatic goals, so the effort will bridge the thermosphere, ionosphere and magnetosphere communities. The science of this project is pertinent to the National Space Weather Action Plan's goals to develop benchmarks for space weather events. This project funds an early career scientist, and engages undergraduates in summer research. The methodology uses several open data sources, including SuperDARN, GPS TEC (Global Positioning System Total Electron Content), high-resolution AMPERE (Active Magnetosphere and Planetary Electrodynamics Response Experiment), and POES (Polar Operational Environmental Satellites) data. The project will gather characteristics of R1/R2 field-aligned currents, auroral boundaries, and the mid-latitude trough for each occurrence of the SAPS-like flows, and then statistically examine them with respect to geophysical parameters.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.