Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa11b..03t&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SA11B-03
Physics
2411 Electric Fields (2712), 2431 Ionosphere/Magnetosphere Interactions (2736), 2712 Electric Fields (2411), 2788 Magnetic Storms And Substorms (7954), 7836 Mhd Waves And Instabilities (2149, 2752, 6050)
Scientific paper
Prompt penetration of interplanetary electric fields to the dayside equator has several important ionospheric effects. The equatorial ionosphere is uplifted to altitudes above the heights of polar orbiting satellites. The uplift leaves the lower altitudes devoid of plasma. Solar photoionization causes the production of a new ionosphere with the consequences of major total electron content (TEC) enhancements. Transport of uplifted equatorial plasma to middle latitudes is driven by the "dayside superfountain" effect. The above processes can lead to TEC enhancements greater than 300 percent. The large prompt penetration eastward electric field and its dayside fountain effect can extend well into the post-sunset hours. The focus of the present talk will be to use ground magnetometer, ionosonde, ground and satellite GPS receiver data and theoretical modeling to answer some of the following questions. How much of the dayside ionosphere was lifted up during this event? How does the height-dependent ionospheric conductivity control the interplanetary electric field penetration? What are the ionospheric and atmospheric consequences of this effect?
Abdu M.
Araki Takeo
Lakhina Gurbax
Mannucci Anthony
McCreadie Heather
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