Generation of traveling convection vortices and field-aligned currents in the magnetosphere by response to an interplanetary tangential discontinuity

Details Generation of traveling convection vortices and field-aligned currents in the magnetosphere by response to an interplanetary tangential discontinuity Generation of traveling convection vortices and field-aligned currents in the magnetosphere by response to an interplanetary tangential discontinuity

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3583c&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 21, p. 3583-3586

Physics

Plasma Physics

8

Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Space Plasma Physics: Discontinuities

Scientific paper

Three-dimensional global magnetohydrodynamic simulations are conducted to study the response of the magnetosheath and the magnetosphere to an interplanetary tangential discontinuity (TD), across which the plasma density increases. A fast mode wave and a transmitted TD are generated in the magnetosheath by the interaction between the interplanetary TD and the bow shock. These waves further propagate and disturb the dayside magnetosphere. The fast mode compressional wave propagates downstream out of the dayside region in about 1 minute. The pressure enhancement associated with the transmitted TD later compresses the magnetopause significantly for several minutes. The generation of traveling convection vortices, shear Alfvén waves, and the associated field-aligned currents (FACs) in the dayside magnetosphere by these pressure pulses is identified in the simulation.

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