Physics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1106g&link_type=abstract
Journal of Geophysical Research (Space Physics), Volume 108, Issue A3, pp. SMP 5-1, CiteID 1106, DOI 10.1029/2002JA009505
Physics
7
Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Magnetosphere-Outer, Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Plasma Sheet
Scientific paper
We have revisited the ideal MHD interchange instability for the case of the nonaligned gradients of the plasma pressure p and unit magnetic flux tube volume V, i.e., the background field-aligned current (FAC) included. Several possibilities of a directional difference between ∇p and ∇V in the Earth's plasma sheet are considered. The growth of an interchange perturbation leading to the pressure-gradient-driven FAC striation is illustrated through numerical simulation in a simple model of the nightside region 1 FAC by Karty et al. [1984] and Yang et al. [1994]. It is shown that the FAC is being striated by the interchange process on a timescale from minutes to tens of minutes. The application to the quiet time discrete arc formation is discussed.
Golovchanskaya I. V.
Maltsev Yu. P.
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