HR: 14:15h
AN: SH52A-03 [PDF]
TI: Categorized Observed and Modeled Stormtime Reponses at Geosynchronous Orbit
AU: * Liemohn, M W
EM: liemohn@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Zhang, J
EM: jichunz@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: DeZeeuw, D L
EM: darrens@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: Los Alamos National Laboratory, NIS-1, MS D466, Los Alamos, NM 87545 United States
AU: Ridley, A J
EM: ridley@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Kozyra, J U
EM: jukozyra@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Gombosi, T I
EM: tamas@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AB:
Solar wind and geosynchronous orbit data for over 400 storms (minimum Dst $<$ -30 nT) from 1989 through 2002 have been
categorized according to various storm parameters (minimum Dst, peak solar wind pressure, minimum interplanetary Bz, main
phase length, and peak plasma sheet density, and solar cycle phase, for example). The superposed epoch averages of the data
in some of these categories are presented and discussed. Morphological differences in the geosynchronous response as a
function of storm category are detailed. The implications of these results for the stormtime ring current are also explored.
The averaged upstream conditions are used as input to the Comprehensive Space Environment Model (CSEM) to simulate each of
these storm classifications. Initial results of these numerical experiments are presented and discussed. Finally,
comparisons of observations and model results at geosynchronous orbit are given (1) to assess the quality of the CSEM results
and (2) to quantitatively examine the ring current dynamics.
DE: 2111 Ejecta, driver gases, and magnetic clouds
DE: 2760 Plasma convection
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting