Storm Time Effects on the Low- to Mid-Latitude Ionosphere

Details Storm Time Effects on the Low- to Mid-Latitude Ionosphere Storm Time Effects on the Low- to Mid-Latitude Ionosphere

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa21a0271j&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SA21A-0271

Physics

2435 Ionospheric Disturbances, 2720 Energetic Particles: Trapped, 2788 Magnetic Storms And Substorms (7954), 3369 Thermospheric Dynamics (0358)

Scientific paper

The first self-consistent study of the impact of storm-time penetration electric fields on the low- to mid-latitude ionosphere is presented. The inner magnetosphere is described by the Rice Convection Model (RCM) and the ionosphere is described by the Naval Research Laboratory (NRL) code SAMI3. The codes are coupled electrodynamically through the electrostatic potential equation, and the storm is modeled via changes in the polar cap potential. Neutral wind driven electric fields are estimated from the Fejer/Scherliess quiet time model. It is found that temporal changes in the polar cap potential produce electric fields that modify the F region equatorial E × B drift velocities: the velocities increase in the daytime and decrease in the nighttime by up to a factor of two. This causes the total electron content (TEC) in the daytime, mid-latitude ionosphere to increase by up to 35%. In addition, the `fountain effect' is enhanced in the post-sunset period.
Research supported by NASA and ONR.

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