Dayside midlatitude ionospheric response to storm time electric fields: A case study for 7 September 2002

Details Dayside midlatitude ionospheric response to storm time electric fields: A case study for 7 September 2002 Dayside midlatitude ionospheric response to storm time electric fields: A case study for 7 September 2002

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11612302d&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A12, CiteID A12302

Physics

Ionosphere: Electric Fields (2712), Ionosphere: Ionospheric Storms (7949), Ionosphere: Midlatitude Ionosphere, Ionosphere: Modeling And Forecasting

Scientific paper

With the storm of 7-8 September 2002 as a study case, we demonstrate that an ionospheric model driven by a suitable storm time convection electric field can reproduce the F region dayside density enhancements associated with the ionospheric storm positive phase. The ionospheric model in this case is the Utah State University Time Dependent Ionospheric Model (TDIM); the electric field model is the University of Michigan's Hot Electron and Ion Drift Integrator (HEIDI). Extensive ground truth is available throughout the study period from two independent sources: ground-based vertical TEC and ionosonde stations; our simulation results are in good agreement with these observations. We address the question of what is the source of the high-density plasma that is seen during the positive storm phase and show that in this case a magnetospheric electric field with an eastward component that penetrates to midlatitudes increases local production on the dayside to a degree that is sufficient to account for the storm time density increases that have been observed.

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