3D Global Simulations of Mode Conversion at the Magnetopause with Quasi-Parallel Shocks

Details 3D Global Simulations of Mode Conversion at the Magnetopause with Quasi-Parallel Shocks 3D Global Simulations of Mode Conversion at the Magnetopause with Quasi-Parallel Shocks

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm41a1985s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM41A-1985

Physics

Plasma Physics

[7835] Space Plasma Physics / Magnetic Reconnection

Scientific paper

Following previous 2D and 3D local simulations of mode conversion at the magnetopause near the Alfven resonance surface, we further examine the mode conversion process under much more complicated conditions of the self-consistent solar wind-magnetosphere interaction using a 3D global hybrid simulation model. During the interaction between the quasi-parallel shock and the Earth's magnetosphere, the fast mode compressional structures are present in the bow shock and the magnetosheath and are carried toward the magnetopause boundary by the solar wind. By tracking the fast mode structures that imping onto the magnetopause boundary layer, we analyze the dynamic evolution of the incident waves and its conversion to the shear Alfven waves and short-wavelength kinetic Alfven waves (KAWs) during the Alfven resonance processes. The KAWs are found to be localized near the magnetopause while propagating in the azimuthal direction, with sharp increases in the parallel electric field and field-aligned currents. A decrease in the magnetic field and increase in the density show an anti-phase relation in the trapped KAWs. The wave structure, propagation, and time evolution in the 3D magnetopause are investigated.

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