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TitleGPS phase scintillation at high latitudes during geomagnetic storms of 7-17 March 2012 - Part 2: Interhemispheric comparison
AuthorPrikryl, P; Ghoddousi-Fard, R; Spogli, L; Mitchell, C N; Li, G; Ning, B; Cilliers, P J; Sreeja, V; Aquino, M; Terkildsen, M; Jayachandran, P T; Jiao, Y; Morton, Y T; Ruohoniemi, J M; Thomas, E G; Zhang, Y; Weatherwax, A T; Alfonsi, L; De Franceschi, G; Romano, V
SourceAnnales Geophysicae vol. 33, 2015 p. 657-670, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20140372
PublisherCopernicus GmbH
Mediapaper; on-line; digital
RelatedThis publication is related to GPS phase scintillation at high latitudes during geomagnetic storms of 7-17 March 2012 - Part 1: The North American sector
File formatpdf
Subjectsextraterrestrial geology; Health and Safety; geomagnetism; geomagnetic fields; geomagnetic variations; scintillometer surveys
Illustrationslocation maps; images; plots
ProgramPublic Safety Geoscience Northern Canada Geohazards Project
Released2015 06 02
AbstractDuring the ascending phase of Solar Cycle 24, solar wind disturbances in the period 7-17 March 2012 resulted in a series of geomagnetic storms. GPS phase scintillation was observed at northern and southern high latitudes by arrays of GNSS Ionospheric Scintillation and TEC Monitors (GISTMs) and geodetic-quality GPS receivers sampling at 1 Hz. Mapped as a function of magnetic latitude and magnetic local time (MLT), the scintillation was observed in the ionospheric cusp, tongue of ionization and sun-aligned arcs in the polar cap, nightside auroral oval and subauroral latitudes. Complementing a companion paper (Prikryl et al., 2014) that focuses on the high-latitude ionospheric response to variable solar wind and GPS phase scintillation observed in the North American sector, interhemispheric comparison reveals commonalities but also differences and asymmetries between the northern and southern high latitudes as a consequence of the coupling between the solar wind and magnetosphere. The interhemispheric asymmetries are caused by the dawn-dusk component of the interplanetary magnetic field controlling the MLT of the cusp entry of the storm enhanced density plasma into the polar cap and the orientation relative to the noon-midnight meridian of the band of scintillation collocated with tongue of ionization.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. High-latitude ionospheric response to geomagnetic storms is compared between the Northern and Southern Hemispheres.

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