HR: 14:25h
AN: SM42D-04    [PDF]
TI: Interplanetary-Ionospheric Coupling: The 6 November 2001 Magnetic Storm Event
AU: * Tsurutani, B T
EM: Bruce.Tsurutani@jpl.nasa.gov
AF: JPL, 4800 Oak Grove Drive, Pasadena, 91109 United States
AU: Mannucci, A J
EM: Anthony.Mannucci@jpl.nasa.gov
AF: JPL, 4800 Oak Grove Drive, Pasadena, 91109 United States
AU: Iijima, B
EM: Byron.Iijima@jpl.nasa.gov
AF: JPL, 4800 Oak Grove Drive, Pasadena, 91109 United States
AU: Abdu, M A
EM: abdu@dae.inpe.br
AF: INPE, CP515, Sao Jose dos Campos, SP 12200-000 Brazil
AU: Sobral, J
EM: sobral@dae.inpe.br
AF: INPE, CP515, Sao Jose dos Campos, SP 12200-000 Brazil
AU: Gonzalez, W
EM: gonzalez@dge.inpe.br
AF: INPE, CP515, Sao Jose dos Campos, SP 12200-000 Brazil
AU: Tsuda, T
EM: tsuda@kurasc.kyoto-u.ac.jp
AF: RSCSA, Kyoto University, Uji, 611 Japan
AU: Fejer, B
EM: bfejer@cc.usu.edu
AF: Utah State University, USU, Logan, UT 84322 United States
AU: Fuller-Rowell, T
EM: Tim.Fuller-Rowell@noaa.gov
AF: University of Colorado, UC, Boulder, CO 80905 United States
AU: Kozyra, J
EM: jukozyra@srvr5.engin.umich.edu
AF: University of Michigan, UM, Ann Arbor, 48109 United States
AU: Foster, J
EM: jcf@haystack.mit.edu
AF: Haystack Obs., Millstone Hill, Westford, MA 01886 United States
AB: The effects of the intense southward interplanetary magnetic fields of the 6 November 2001 event is studied using ground-based GPS receiver data, satellite (vertical) GPS receiver data, satellite altimeter data and Brazilian near-equatorial ionosonde data. Strong dawn-to-dusk directed interplanetary electric fields are generated by shock compression of an upstream slow magnetic cloud southward Bz magnetic fields. The electric field reached an unusually high approx. 55 mV/m intensity. Immediately after shock impingement, there were strong dayside and nightside ionospheric effects. The CHAMP GPS data plus ground based GPS data indicate that the dayside ionosphere was lifted to altitudes above the satellite (approx. 430 km). The vertical ionospheric TEC increased by 50-100 %. Nightside ionosonde data indicate strong decreases in TEC. During the intense interplanetary electric field event, an unusual plasma feature is noted. Enhanced midlatitutde densities occur with a sharp drop-off of densities at higher latitudes. The latitude of the drop-off decreased with storm development, similar to plasmaspheric erosion during magnetospheric convection electric field events. Finally large decreases in the dayside TEC are noted approx. 6 hrs after shock passage. This decrease is approx. 40 % below quiet daytime values. These interesting ionospheric features will be discussed in terms of prompt penetration of interplanetary electric fields, shielding fields, and neutral winds and composition.
DE: 2139 Interplanetary shocks
DE: 2411 Electric fields (2712)
DE: 2415 Equatorial ionosphere
DE: 2435 Ionospheric disturbances
DE: 2443 Midlatitude ionosphere
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting