| Title | GPS phase scintillation at high latitudes during two geomagnetic storms |
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| Author | Prikryl, P; Ghoddousi-Fard, R; Ruohoniemi, J M; Thomas, E G |
| Source | Auroral dynamics and space weather; by Zhang, Y (ed.); Paxton, L J (ed.); American Geophysical Union Geophysical Monograph 215, 2015 p. 211-232, https://doi.org/10.1002/9781118978719.ch15 |
| Year | 2015 |
| Alt Series | Earth Sciences Sector, Contribution Series 20140346 |
| Publisher | John Wiley & Sons, Inc |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Subjects | geophysics; extraterrestrial geology; Health and Safety; auroras; geomagnetism; geomagnetic fields; Global positioning systems |
| Program | Public Safety Geoscience Northern Canada Geohazards Project |
| Released | 2015 11 20 |
| Abstract | 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. |
| 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. This paper examines the occurrence of GPS phase scintilaltion at high latitudes during geomagnetic storms caused by major solar wind disturbances. This provides information to guide the design of space weather
hazard forecasting. |
| GEOSCAN ID | 295624 |
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