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TitreGPS phase scintillation at high latitudes during two geomagnetic storms
AuteurPrikryl, P; Ghoddousi-Fard, R; Ruohoniemi, J M; Thomas, E G
SourceAuroral dynamics and space weather; par Zhang, Y (éd.); Paxton, L J (éd.); 2016 p. 211-232
Année2016
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140346
ÉditeurAmerican Geophysical Union
Documentlivre
Lang.anglais
Mediapapier; numérique
Sujetsaurores; géophysique
ProgrammeNord du Canada, risque géoscience, Géoscience pour la sécurité publique
LiensOrder online - Commander en ligne
Résumé(disponible en anglais seulement)
Intense GPS phase scintillation was observed during two geomagnetic storms that were caused by impacts of coronal mass ejections on November 1, 2011 and March 17, 2013. Ionospheric regions of enhanced scintillation are identified in the context of coupling between solar wind and magnetosphere-ionosphere system. Scintillation was collocated with an expanded auroral oval and with a tongue of ionization (TOI) drawn through the cusp into the polar cap from the dayside storm-enhanced plasma density (SED). Intense scintillation was collocated with regions of fast drifting decameter F-region irregularities particularly in the cusp and dayside polar cap and with strong return convection in the post-midnight auroral oval. Weak scintillation mapped to the poleward edge of main trough and subauroral polarization stream (SAPS). The scintillation occurrence magnetic local time of these regions was controlled by the IMF BY. A link between scintillation occurrence collocated with TOI and the nightside auroral oval, which is consistent with recently discovered relationships between polar cap patches and substorms [Nishimura et al., 2013] and between enhanced polar cap flows and poleward boundary intensifications [Zou at al., 2014], is suggested.
Résumé(Résumé en langage clair et simple, non publié)
La météo spatiale fait référence aux conditions dynamiques du soleil et de l'environnement spatial qui peuvent influer sur les infrastructures essentielles. RNCan exploite le Centre canadien de météo spatiale et étudie les effets de la météo spatiale sur les systèmes d'alimentation électrique, les pipelines, les satellites, les installations de communications radio et le FGISM pour aider l'industrie canadienne à comprendre et à atténuer les effets de la météo spatiale.
GEOSCAN ID295624