Physics
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11600k11j&link_type=abstract
Journal of Geophysical Research, Volume 116, CiteID A00K11
Physics
Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Field-Aligned Currents And Current Systems (2409), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431), Magnetospheric Physics: Plasma Waves And Instabilities (2471)
Scientific paper
The physical processes that determine the fluid quantities and the self-consistent electric field (E$\parallel$) parallel to the magnetic field have been an unresolved problem in magnetospheric physics for over 40 years. We review a recently developed kinetic and multimoment fluid theory for inhomogeneous, nonuniformly magnetized plasma with temperature anisotropy in the guiding-center and gyrotropic approximation and apply the theory to solve for the quasi steady state in the long-range potential region of a downward Birkeland current sheet when electrostatic ion cyclotron turbulence is dominant. We find that an electron, bump-on-tail-driven ion cyclotron instability produces the turbulence and that a large enhancement in ∣E$\parallel$∣ by nearly a factor of 40 occurs when the turbulence is present compared to the case when it is absent. Anomalous momentum transfer (anomalous resistivity) by itself has a very small effect on E$\parallel$; however, the presence of the turbulence and the anomalous energy transfers (anomalous heating and cooling) that result have a very large effect on the entire solution. In the electron and ion momentum balance equations for E$\parallel$, the turbulence enhances the magnitude of E$\parallel$ by reducing the effect of the generalized parallel pressure gradients and thereby enhancing the effect of the mirror forces. A new, nonlinear formula for the current-voltage relationship in downward Birkeland current regions is also given.
Basu Bamandas
Grossbard Neil
Jasperse John R.
Lund Eric J.
No associations
LandOfFree
Anomalous transport effects on the parallel E field in downward auroral current regions of the Earth's magnetosphere 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 Anomalous transport effects on the parallel E field in downward auroral current regions of the Earth's magnetosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous transport effects on the parallel E field in downward auroral current regions of the Earth's magnetosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1680540