A quantitative test of the self-organization hypothesis of the magnetopause Kelvin-Helmholtz instability as an inverse problem

Details A quantitative test of the self-organization hypothesis of the magnetopause Kelvin-Helmholtz instability as an inverse problem A quantitative test of the self-organization hypothesis of the magnetopause Kelvin-Helmholtz instability as an inverse problem

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..409m&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 3, p. 409-412

Physics

Plasma Physics

10

Space Plasma Physics: Nonlinear Phenomena, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Mhd Waves And Instabilities, Space Plasma Physics: Numerical Simulation Studies

Scientific paper

The self-organization hypothesis of the magnetopause Kelvin-Helmholtz (K-H) instability is tested against observations by two-dimensional (2-D) magnetohydrodynamic (MHD) simulations for two different initial seed perturbations. The linear relationships are obtained by the simulations between the period of the magnetopause oscillation caused by the K-H instability and the distance along the magnetopause from the subsolar point. The comparison of the linear relationships with that obtained from reported observations of the magnetopause oscillations gives a reasonable thickness of the velocity shear layer near the subsolar point of 1570km-3010km and a reasonable average magnetosheath flow speed along the magnetopause of 399km/sec-766km/sec. This suggests that the self-organization of the magnetopause K-H instability, i.e., the successive pairings of vortices, really occurs along the magnetopause. The present comparison provides a useful method to determine the thickness of the velocity shear layer near the subsolar point as an inverse problem.

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