Physical interpretation of the thermosphere-ionosphere response to the April 2002 magnetic storm.

Details Physical interpretation of the thermosphere-ionosphere response to the April 2002 magnetic storm. Physical interpretation of the thermosphere-ionosphere response to the April 2002 magnetic storm.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa41a1397f&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA41A-1397

Physics

2441 Ionospheric Storms (7949), 3369 Thermospheric Dynamics (0358), 7954 Magnetic Storms (2788), 7959 Models

Scientific paper

The April 2002 storm event was not one of the most severe magnetic storms that occurred during the Solar Cycle 23. Nevertheless, large CMEs and one of the largest solar flares of the current solar cycle impacted the Earth's space environment during this storm period. This storm occurred just after equinox, so the ionosphere-thermosphere system was undergoing an equinox transition. The global wind and composition structure therefore might still retain characteristics of the preceding equinox, but also reveal signatures of the coming solstice. In this study, a global, three-dimensional, time-dependent, non-linear coupled model of the thermosphere, ionosphere, plasmasphere, and electrodynamics (CTIPe) is used to examine and analyse the relative contribution of various physical mechanisms responsible for the ionosphere- thermosphere response to this storm event. Horizontal thermospheric winds, thermal expansion and electric fields are amongst the investigated mechanisms. Observational data from ground and space, such as GPS- TEC provided by the Space Environment Center (SEC) data assimilation model in its global configuration (MAGIC), are used to compare and support results provided by the physical model.

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