Multi-Instrument Study of High Latitude Ionospheric Dynamics due to Enhanced Solar Wind Compression

Solar events such as coronal mass ejections (CMEs) and co-rotating interaction regions (CIRs) can cause sharp increases in the dynamic pressure of the solar wind. When high pressure solar wind generated by these events impacts and compresses the Earth's magnetosphere, storm sudden commencement (SSC) can occur, which begins the initial phase of the storm. During the storm initial phase, a variety of transient effects can occur in the ionosphere, such as enhanced ion outflow and generation of ionospheric density structures. Such density structures can potentially lead to ionospheric scintillation and disrupt radio communication systems such as GNSS. In this study, we investigate ionospheric dynamic variations in the high-latitude region after the enhanced solar wind compression by using coordinated data from multiple instruments. These include scintillation monitors, GNSS receivers, ground-based and space-borne magnetometers, and ground-based radars.