HR: 0800h
AN: SM41A-0315 [Abstracts]
TI: Global Circulation and Impact of Plasmaspheric Plumes
AU: * Moore, T E
EM: thomas.e.moore@nasa.gov
AF: Goddard Space Flight Center, Heliophysics Science Div.
Code 670, Greenbelt, MD 20771, United States
AU: Fok, M H
EM: mei-ching.fok@gsfc.nasa.gov
AF: Goddard Space Flight Center, Heliophysics Science Div.
Code 670, Greenbelt, MD 20771, United States
AU: Chen, S
EM: sean.chen@gsfc.nasa.gov
AF: Goddard Space Flight Center, Heliophysics Science Div.
Code 670, Greenbelt, MD 20771, United States
AU: Delcourt, D C
EM: dominique.delcourt@cetp.ipsl.fr
AF: Centre d'etudes des Environments Terrestre et Planetaires (CETP), 4, Avenue De Neptune,
St. Maur des Fosses, 94107, France
AU: Fedder, J A
EM: fedder@ppdu.nrl.navy.mil
AF: LET Corporation, 4431 MacArthur Blvd. N.W., Washington, DC 20007, United States
AU: Slinker, S P
EM: slinker@ppdu.nrl.navy.mil
AF: Naval Research Laboratory
Code 6794, 4555 Overlook Ave. S.W., Washington, DC 20375, United States
AB:
We report results from the global circulation model of Lyon, Fedder, and Mobarry with an embedded model of the
inner magnetosphere including the plasmasphere. The combination is used to initiate large numbers of
representative protons on the geosynchronous orbit L shell, to assign particle weightings, to track their
subsequent trajectories in the 3D fields. This permits us to study the global circulation of plasmaspheric plumes
and to compare these with Polar observations from the dayside magnetopause region. A range of events is
studied from an isolated period of SBz in the solar wind, to a large storm sequence. We consider effects on
circulating plasmas reaching the dayside reconnection X-line, the population of the plasma sheet with
ionospheric protons, and the generation of ring current pressure from this source, compared with solar wind,
polar wind, and auroral wind sources. We find that the transient plasmaspheric plume source is large in terms of
total fluence, but of modest proportions in terms of contribution to the ring current. Implications of this and other
results for improved space weather modeling and prediction will be discussed.
UR: http://ipb.gsfc.nasa.gov/public/traj/
DE: 7954 Magnetic storms (2788)
DE: 7959 Models
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting