Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm44a..04j&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SM44A-04
Physics
2736 Magnetosphere/Ionosphere Interactions (2431), 2753 Numerical Modeling, 2772 Plasma Waves And Instabilities (2471), 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954)
Scientific paper
The plasma composition in the near-Earth magnetosphere varies significantly with geomagnetic and solar activity, with H+ being the dominant ring current ion species during quiet time, and O+ contributing mostly during active time. We use our kinetic ring current-atmosphere interactions model (RAM) that has been recently extended for non-dipolar magnetic field geometry to investigate the effects of various O+/H+ composition ratios applied at the outer boundary on ring current dynamics. The RAM is coupled with a 3-D equilibrium model that calculates self-consistently the magnetic field in force balance with the anisotropic ring current ion distributions. Such anisotropy is critically important for the excitation of EMIC waves, whose characteristics depend strongly on the presence of both cold and energetic heavy ions (mainly He+ and O+) in the plasmas. We simulate the sunward transport, acceleration, and loss of ring current ions during a geomagnetic storm using this newly improved model with plasma and magnetic field boundary conditions supplied from the global BATSRUS model from the SWMF. Ring current development and EMIC wave instability during various storm phases are presented and their dependence on ion composition is discussed. The effect of non-dipolar magnetic field geometry and the feedback of a self-consistently computed magnetic field on ring current dynamics are investigated.
Jordanova Vania K.
Tóth Géza
Zaharia Sorin
No associations
LandOfFree
Effects of Heavy Ions on Ring Current Dynamics from Dipolar, Empirical, or Self-Consistent Magnetic Field Simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of Heavy Ions on Ring Current Dynamics from Dipolar, Empirical, or Self-Consistent Magnetic Field Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of Heavy Ions on Ring Current Dynamics from Dipolar, Empirical, or Self-Consistent Magnetic Field Simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1401319