The Effect of IMF Clock Angle and Geomagnetic Dipole Tilt Angle on Solar Wind Entry Under Northward IMF Condition

HR: 10:35h
AN: SM22A-02 [Abstracts]
TI: The Effect of IMF Clock Angle and Geomagnetic Dipole Tilt Angle on Solar Wind Entry Under Northward IMF Condition
AU: * Li, W
EM: wenhuil@cisunix.unh.edu
AF: Space Science Center, University of New Hampshire, Morse Hall 39 College Road, Durham, NH 03824 United States
AU: Raeder, J
EM: j.raeder@unh.edu
AF: Space Science Center, University of New Hampshire, Morse Hall 39 College Road, Durham, NH 03824 United States
AU: Dorelli, J
EM: john.dorelli@unh.edu
AF: Space Science Center, University of New Hampshire, Morse Hall 39 College Road, Durham, NH 03824 United States
AU: Lavraud, B
EM: lavraud@lanl.gov
AF: Space Science and Applications, Los Alamos National Laboratory, P.O. Box 1663, MS D466, Los Alamos, NM 87545 United States
AU: Thomsen, M
EM: mthomsen@lanl.gov
AF: Space Science and Applications, Los Alamos National Laboratory, P.O. Box 1663, MS D466, Los Alamos, NM 87545 United States
AB: Double high-latitude reconnection plays an important role in the formation of both cold dense plasma sheet (CDPS) and low latitude boundary layer (LLBL) when interplanetary magnetic field (IMF) is due northward. It is not clear, however, how the reconnection process, and thus the plasma entry, change if the IMF clock angle or the geomagnetic dipole tile angle is different from zero. Recent Cluster observations have shown that double high-latitude reconnection can occur for IMF clock angle of up to 60°, and that the dipole tilt determines in which hemisphere high-latitude reconnection of a given magnetosheath field line occurs first. We use the OpenGGCM global magnetosphere model to study in detail the effect of the IMF clock angle and the geomagnetic dipole tilt angle on plasma entry under northward IMF condition. Specifically, we examine the reconnection topology, efficiency, and the rate at which plasma enters the magnetosphere.
DE: 7835 Magnetic reconnection (2723, 7526)
DE: 7859 Transport processes
DE: 7959 Models
DE: 7974 Solar effects
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005