Ionospheric signatures of a plasmaspheric plume over Europe

Details Ionospheric signatures of a plasmaspheric plume over Europe Ionospheric signatures of a plasmaspheric plume over Europe

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa43c..06y&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA43C-06

Physics

2431 Ionosphere/Magnetosphere Interactions (2736), 2463 Plasma Convection (2760), 2481 Topside Ionosphere, 2736 Magnetosphere/Ionosphere Interactions (2431), 2768 Plasmasphere

Scientific paper

Previously, ionospheric signatures of plasmaspheric plumes were reported only at the North American longitude sector. This led to the hypothesis that the geomagnetic field configuration at those longitudes played a vital role in the observation of plasmaspheric plume signatures only over the American continent. The present study indicates that plasmaspheric plumes can be formed at any longitude sector on Earth. Using data from the ground-based global positioning system (GPS) receiver network, we find greatly elevated total electron content (TEC) over European continent during storm recovery phase on 12 September 2005. The TEC seen over Europe has a tongue of enhanced ionization extending to higher latitudes. This could be the signature of plasmaspheric plumes which are routinely observed in IMAGE EUV images (but not in this case due to data availability). The DMSP F15 ion drift meter observations are also used to understand the ion convection pattern during this interval. Therefore, our observations clearly exhibit that the ionospheric signatures of the plasmaspheric plume are not observed only in the North American sector rather it can be observed everywhere as long as a dense array of instruments are available to identify this signature.

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