HR: 08:35h
AN: SA11B-03    [Abstracts]
TI: The Dayside Superfountain Effect: October 30, 2003 (Halloween) Magnetic Storm
AU: * Tsurutani, B
EM: bruce.tsurutani@jpl.nasa.gov
AF: JPL, MS 169-506, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Abdu, M
EM: abdu@dae.inpe.br
AF: INPE, Ave Dos Astronautus 1758, Sao Jose dos Cam, SP 12245970 Brazil
AU: Araki, T
EM: araki@kugi.kyoto-u.ac.jp
AF: KUGI, Kyoto University, Kyoto, 606-8502 Japan
AU: Lakhina, G
EM: gslakhina@rediffmail.com
AF: Indian Institute of Geomagnetism, Dr Nanabhai Moos Marg, Mumbai, 40005 India
AU: Mannucci, A
EM: anthony.mannucci@jpl.nasa.gov
AF: JPL, MS 169-506, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: McCreadie, H
EM: bilby@kugi.kyoto-u.ac.jp
AF: World Data Center for Geomagnetism, Kyoto University, Kyoto, 606-8502 Japan
AU: Saito, A
EM: saitoua@kugi.kyoto-u.ac.jp
AF: KUGI, Kyoto University, Kyoto, 606-8502 Japan
AU: Sobral, J
EM: sobral@dae.inpe.br
AF: INPE, Ave Dos Astronautus 1758, Sao Jose dos Cam, SP 12245970 Brazil
AU: Tsuda, T
EM: tsuda@rish.kyoto-u.ac.jp
AF: RISH, Kyoto University, Uji, 611-0011 Japan
AU: Verkhoglyadova, O
EM: olgav@ucr.edu
AF: IGPP, University of California, Riverside, CA 92521 United States
AB: 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?
DE: 2411 Electric fields (2712)
DE: 2431 Ionosphere/magnetosphere interactions (2736)
DE: 2712 Electric fields (2411)
DE: 2788 Magnetic storms and substorms (7954)
DE: 7836 MHD waves and instabilities (2149, 2752, 6050)
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005