GPS phase scintillation at high latitudes during geomagnetic storms of 7-17 March 2012-Part 1: The North American sector

dc.contributor.authorPrikryl, P.en
dc.contributor.authorGhoddousi-Fard, R.en
dc.contributor.authorThomas, E. G.en
dc.contributor.authorRuohoniemi, J. Michaelen
dc.contributor.authorShepherd, Simon G.en
dc.contributor.authorJayachandran, P. T.en
dc.contributor.authorDanskin, D. W.en
dc.contributor.authorSpanswick, E.en
dc.contributor.authorZhang, Y.en
dc.contributor.authorJiao, Y.en
dc.contributor.authorMorton, Y. T.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.description.abstractThe interval of geomagnetic storms of 7-17 March 2012 was selected at the Climate and Weather of the Sun-Earth System (CAWSES) II Workshop for group study of space weather effects during the ascending phase of solar cycle 24 (Tsurutani et al., 2014). The high-latitude ionospheric response to a series of storms is studied using arrays of GPS receivers, HF radars, ionosondes, riometers, magnetometers, and auroral imagers focusing on GPS phase scintillation. Four geomagnetic storms showed varied responses to solar wind conditions characterized by the interplanetary magnetic field (IMF) and solar wind dynamic pressure. As a function of magnetic latitude and magnetic local time, regions of enhanced scintillation are identified in the context of coupling processes between the solar wind and the magnetosphere-ionosphere system. Large southward IMF and high solar wind dynamic pressure resulted in the strongest scintillation in the nightside auroral oval. Scintillation occurrence was correlated with ground magnetic field perturbations and riometer absorption enhancements, and collocated with mapped auroral emission. During periods of southward IMF, scintillation was also collocated with ionospheric convection in the expanded dawn and dusk cells, with the antisunward convection in the polar cap and with a tongue of ionization fractured into patches. In contrast, large northward IMF combined with a strong solar wind dynamic pressure pulse was followed by scintillation caused by transpolar arcs in the polar cap.en
dc.description.notesInfrastructure funding for CHAIN was provided by the Canada Foundation for Innovation and the New Brunswick Innovation Foundation. CHAIN and CGSM operation is conducted in collaboration with the Canadian Space Agency (CSA). The magnetometer and riometer operation and data processing was supported by the Geomagnetic Laboratory, Natural Resources Canada. The Virginia Tech authors acknowledge the support of NSF awards AGS-0838219 and AGS-0946900. The authors acknowledge the use of SuperDARN data. SuperDARN is a collection of radars funded by national scientific funding agencies of Australia, Canada, China, France, Japan, South Africa, the United Kingdom, and the United States of America. The DMSP particle detectors were designed by Dave Hardy of the Air Force Research Laboratory, and the data were obtained from Johns Hopkins University Applied Research Laboratory. The International GNSS Service (IGS) and its contributing organizations, including Denmark Technical University National Space Institute, are thanked for 1 Hz GPS data. We acknowledge use of NASA/GSFC's Space Physics Data Facility's OMNIWeb and CDAWeb service as well as OMNI data. We acknowledge contributions of the ACE, Geotail and Wind teams. This work was supported by the Public Safety Geosciences program of the Natural Resources Canada, Earth Sciences Sector (NRCan ESS contribution number 20140371).en
dc.description.sponsorshipCanada Foundation for InnovationCanada Foundation for Innovation; New Brunswick Innovation Foundation; NSFNational Science Foundation (NSF) [AGS-0838219, AGS-0946900]; national scientific funding agency of Australia; national scientific funding agency of Canada; national scientific funding agency of China; national scientific funding agency of France; national scientific funding agency of Japan; national scientific funding agency of South Africa; national scientific funding agency of United Kingdom; national scientific funding agency of United States of America; Natural Resources Canada, Earth Sciences Sector (NRCan ESS)Natural Resources Canada [20140371]en
dc.publisherEuropean Geosciences Unionen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.subjectionospheric disturbancesen
dc.subjectionospheric irregularitiesen
dc.subjectpolar ionosphereen
dc.titleGPS phase scintillation at high latitudes during geomagnetic storms of 7-17 March 2012-Part 1: The North American sectoren
dc.title.serialAnnales Geophysicaeen
dc.typeArticle - Refereeden
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